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Curriculum & Standards · Arithmetic

Arithmetic, calibrated to the world's most demanding standards.

Counting, place value, addition, subtraction, multiplication, division, decimals and word problems — sequenced to match Singapore Primary 1-6, Japan's kuku and Korea, with every topic backed by an official ministry or curriculum document.

64

Skills

14

Modules (hex)

12

Official standards benchmarked

4–12

Age coverage

Why we benchmark against East Asia

TIMSS 2023 ranks Grade 4 mathematics across 64 countries. The top of the leaderboard is dominated by East Asia. Rodybee's arithmetic program is calibrated to that top, not to a national average — so a child in our program practices at the world's most demanding pace.

#CountryTIMSS score
1🇸🇬Singapur615
2🇹🇼Chinese Taipei607
3🇭🇰Hong Kong594
3🇰🇷Corea594
5🇯🇵Japón591

Source: TIMSS 2023 Grade 4 Math Achievement

Find your child's level

Pick an age and see exactly what we teach at that point — and what the most demanding standards in the world expect at the same age. There's no marketing fluff: each topic links to the official curriculum document.

Your child's age

Rodybee for your child · 7 años

What we teach at this age

  • Add +4

    Add 4 to any number 0–9.

    In module · Hex 3 — Adding & taking 4-5

  • Add +5

    Add 5 to any number 0–9.

    In module · Hex 3 — Adding & taking 4-5

  • Subtract −4

    Take 4 away from any number up to 13.

    In module · Hex 3 — Adding & taking 4-5

  • Subtract −5

    Take 5 away from any number up to 14.

    In module · Hex 3 — Adding & taking 4-5

  • Doubles

    Double small numbers — 5+5, 7+7, 9+9.

    In module · Hex 3 — Adding & taking 4-5

  • Count to 50

    Numbers and what comes next, up to 50.

    In module · Hex 3 — Adding & taking 4-5

  • Place value — tens and ones

    How many tens and how many ones make up a two-digit number.

    In module · Hex 3 — Adding & taking 4-5

  • Add +6

    Add 6 to any number 0–9.

    In module · Hex 4 — Adding & taking 6-7

  • Add +7

    Add 7 to any number 0–9.

    In module · Hex 4 — Adding & taking 6-7

  • Subtract −6

    Take 6 away from any number up to 15.

    In module · Hex 4 — Adding & taking 6-7

  • Subtract −7

    Take 7 away from any number up to 16.

    In module · Hex 4 — Adding & taking 6-7

  • Complement to 10

    What plus this gets to 10?

    In module · Hex 4 — Adding & taking 6-7

  • Number bonds to 10

    Find the partner that completes 10 — like 7 and ?

    In module · Hex 4 — Adding & taking 6-7

  • Add +8

    Add 8 to any number 0–9.

    In module · Hex 5 — Adding & taking 8-9

  • Add +9

    Add 9 to any number 0–9.

    In module · Hex 5 — Adding & taking 8-9

  • Subtract −8

    Take 8 away from any number up to 17.

    In module · Hex 5 — Adding & taking 8-9

  • Subtract −9

    Take 9 away from any number up to 18.

    In module · Hex 5 — Adding & taking 8-9

  • Make 10

    Bridge through 10 — 8+5 = 8+2+3.

    In module · Hex 5 — Adding & taking 8-9

  • Single-digit addition (mixed)

    Mix all single-digit additions for fluency.

    In module · Hex 6 — Single-digit fluency

  • Single-digit subtraction (mixed)

    Mix all single-digit subtractions for fluency.

    In module · Hex 6 — Single-digit fluency

  • Near doubles

    When two numbers are right next to each other — 6+7.

    In module · Hex 6 — Single-digit fluency

  • Subtract from 20

    Take any number away from 20.

    In module · Hex 6 — Single-digit fluency

  • Word problems (one step)

    Read a real-world problem and pick the operation that solves it.

    In module · Hex 6 — Single-digit fluency

  • Two-digit addition (no carry)

    Add two-digit numbers without carrying.

    In module · Hex 7 — Two-digit & first tables

  • Two-digit subtraction (no borrow)

    Subtract two-digit numbers without borrowing.

    In module · Hex 7 — Two-digit & first tables

  • Multiply by 2

    Times tables — 2 (0×2 to 12×2).

    In module · Hex 7 — Two-digit & first tables

  • Multiply by 5

    Times tables — 5.

    In module · Hex 7 — Two-digit & first tables

  • Multiply by 10

    Times tables — 10.

    In module · Hex 7 — Two-digit & first tables

  • Place value — hundreds

    How many hundreds, tens, and ones make up a three-digit number.

    In module · Hex 7 — Two-digit & first tables

  • Two-digit addition (with carry)

    Add two-digit numbers, carrying when needed.

    In module · Hex 8 — Two-digit fluency

  • Two-digit subtraction (with borrow)

    Subtract two-digit numbers, borrowing when needed.

    In module · Hex 8 — Two-digit fluency

  • Multiply by 3

    Times tables — 3.

    In module · Hex 8 — Two-digit fluency

  • Multiply by 4

    Times tables — 4.

    In module · Hex 8 — Two-digit fluency

  • Count to 1,000

    Numbers and what comes next, up to 1,000.

    In module · Hex 8 — Two-digit fluency

  • Three-digit addition (no regrouping)

    Add three-digit numbers without regrouping.

    In module · Hex 8 — Two-digit fluency

  • Three-digit subtraction (no regrouping)

    Subtract three-digit numbers without regrouping.

    In module · Hex 8 — Two-digit fluency

  • Multiply by 6

    Times tables — 6.

    In module · Hex 9 — Times tables fluency

  • Multiply by 7

    Times tables — 7.

    In module · Hex 9 — Times tables fluency

  • Multiply by 8

    Times tables — 8.

    In module · Hex 9 — Times tables fluency

  • Multiply by 9

    Times tables — 9.

    In module · Hex 9 — Times tables fluency

  • Three-digit addition (with regrouping)

    Add three-digit numbers with regrouping (carrying).

    In module · Hex 9 — Times tables fluency

  • Three-digit subtraction (with regrouping)

    Subtract three-digit numbers with regrouping (borrowing).

    In module · Hex 9 — Times tables fluency

Highest international bar at this age · G1

🇸🇬Singapur

Sumar/restar dentro de 100 con number bonds (CPA). Multiplicación introducida como suma repetida. División como reparto.

Grade-by-grade benchmark

Full table of what each major standard expects per grade. Every cell is sourced from the official ministry, board or framework document.

K

Kindergarten · ~5–6 años

Highest bar · 🇺🇸 Estados Unidos

Contar a 100 por unos y dieces, sumar/restar dentro de 10, descomponer 11–19 = 10 + unidades.

CountryExpected topicsOfficial source
🇺🇸Estados UnidosContar a 100. Sumar/restar dentro de 10. Componer 11-19.Common Core State Standards (CCSS-M)
🇦🇺AustraliaContar 0-20, subitizing, parte-todo de 5 y 10.ACARA Mathematics F-6 Sequence of Content
🇪🇸EspañaConteo a 10, comparación, suma/resta concreta within 10.BOE LOMLOE Real Decreto 157/2022

Rodybee skills at this grade

Count to 10 · Count to 20 · Add +2 · Subtract −2

G1

1° Grado / Primary 1 · ~6–7 años

Highest bar · 🇸🇬 Singapur

Sumar/restar dentro de 100 con number bonds (CPA). Multiplicación introducida como suma repetida. División como reparto.

CountryExpected topicsOfficial source
🇸🇬SingapurNúmeros a 100. Suma/resta dentro de 100. Intro multiplicación y división. Money.Singapore MOE Primary Mathematics Syllabus 2021
🇺🇸Estados UnidosSuma/resta within 20 word problems. Place value 2 dígitos. Sumar within 100.Common Core State Standards (CCSS-M)
🇯🇵JapónNumbers within 100. Suma/resta within 100 (sin carry cruzando decena).MEXT Japan Elementary School Mathematics Teaching Guide
🇪🇸EspañaCálculo mental con naturales hasta 999 (LOMLOE 1er ciclo).BOE LOMLOE Real Decreto 157/2022

Rodybee skills at this grade

Count to 50 · Count to 100 · Place value — tens and ones · Number bonds to 10 · Doubles · Complement to 10 · Make 10 · Add +5 · Subtract −5

G2

2° Grado / Primary 2 · ~7–8 años

Highest bar · 🇯🇵 Japón

Tablas 1×1 a 9×9 memorizadas (kuku). Suma/resta within 1000. Algebraic expressions for multiplication.

CountryExpected topicsOfficial source
🇯🇵JapónKuku (tablas 1×1 a 9×9 memorizadas). Suma/resta within 1000.MEXT Japan Elementary School Mathematics Teaching Guide
🇸🇬SingapurNúmeros a 1000. Tablas 2, 3, 4, 5 y 10 memorizadas. Word problems 1-step.Singapore MOE Primary Mathematics Syllabus 2021
🇺🇸Estados UnidosFluency suma/resta within 20 mental. Suma/resta within 1000. Word problems 2-step.Common Core State Standards (CCSS-M)

Rodybee skills at this grade

Two-digit addition (no carry) · Two-digit subtraction (no borrow) · Multiply by 2 · Multiply by 5 · Multiply by 10 · Place value — hundreds · Word problems (one step)

G3

3° Grado / Primary 3 · ~8–9 años

Highest bar · 🇸🇬 Singapur

Números a 10,000. Tablas 6-9 memorizadas. Word problems multi-step con bar model.

CountryExpected topicsOfficial source
🇸🇬SingapurNúmeros a 10,000. Tablas 6-9. Bar model multi-step.Singapore MOE Primary Mathematics Syllabus 2021
🇺🇸Estados UnidosFluency mult/div within 100. Productos one-digit memorizados. Round to 10/100.Common Core State Standards (CCSS-M)
🇰🇷CoreaNumbers a 10,000. Suma/resta 4-digit. Multiplicación y división completa.Korea 2022 Revised Curriculum

Rodybee skills at this grade

Two-digit addition (with carry) · Two-digit subtraction (with borrow) · Multiply by 3 · Multiply by 4 · Multiply by 6 · Multiply by 7 · Multiply by 8 · Multiply by 9 · Times tables 2 through 10 · Count to 1,000 · Three-digit addition (no regrouping) · Three-digit subtraction (no regrouping) · Divide by 2 · Divide by 5 · Divide by 10

G4

4° Grado / Primary 4 · ~9–10 años

Highest bar · 🇯🇵 Japón

Numbers hasta 億 (cien millones). División larga 2-digit divisor. Decimales formal.

CountryExpected topicsOfficial source
🇯🇵JapónRango hasta 億. División larga 2-digit divisor. Decimales y fracciones formal.MEXT Japan Elementary School Mathematics Teaching Guide
🇸🇬SingapurNúmeros a 100,000. Cuatro operaciones whole numbers. Factores y múltiplos. Decimales (tenths, hundredths).Singapore MOE Primary Mathematics Syllabus 2021
🇺🇸Estados UnidosMultiplicar hasta 4-digit × 1-digit y 2×2. División hasta 4-digit ÷ 1-digit con remainder. Factores 1-100, primos.Common Core State Standards (CCSS-M)

Rodybee skills at this grade

Three-digit addition (with regrouping) · Three-digit subtraction (with regrouping) · Divide by 3 · Divide by 4 · Divide by 6 · Divide by 7 · Divide by 8 · Divide by 9 · Two-digit × one-digit multiplication

G5

5° Grado / Primary 5 · ~10–11 años

Highest bar · 🇸🇬 Singapur

Algoritmo estándar mult multi-digit. División 4-digit ÷ 2-digit. Operaciones decimales hundredths. Álgebra elemental.

CountryExpected topicsOfficial source
🇸🇬SingapurWhole numbers a millones. Operaciones decimales (≤ 2 d.p. × 1-digit). Porcentaje, ratio, álgebra introductoria.Singapore MOE Primary Mathematics Syllabus 2021
🇺🇸Estados UnidosFluency mult con algoritmo estándar multi-digit. División 4-digit ÷ 2-digit. ±×÷ decimales hundredths.Common Core State Standards (CCSS-M)
🇯🇵JapónMult/div de decimales. Ratio. Porcentaje.MEXT Japan Elementary School Mathematics Teaching Guide

Rodybee skills at this grade

Long division (multi-digit) · Decimals — tenths and hundredths

G6

6° Grado / Primary 6 · ~11–12 años

Highest bar · 🇸🇬 Singapur

Place value a millones+. Álgebra (letras, ecuaciones simples). Ratio multi-quantity, porcentaje (impuestos, descuentos), velocidad.

CountryExpected topicsOfficial source
🇸🇬SingapurÁlgebra (letras, simple equations). Ratio multi-quantity, percentage (tax/discount), speed. Word problems algebraicos con bar model.Singapore MOE Primary Mathematics Syllabus 2021
🇺🇸Estados UnidosFluency división multi-digit con algoritmo estándar. ±×÷ decimales con algoritmo. Números negativos. Razones y porcentajes.Common Core State Standards (CCSS-M)
🇰🇷CoreaOperaciones combinadas con decimales y fracciones. Ratio, percentage.Korea 2022 Revised Curriculum

Rodybee skills at this grade

Long division (multi-digit) · Decimals — tenths and hundredths

Full research document

Methodology, gap analysis, recommendations and the complete list of sources are in the underlying research markdown.

Read the full benchmark document
Arithmetic Curriculum & Standards — Rodybee