# Maths in a learning game for children — MetaUniver.xyz

> Starter maths topics for grades 1–11: numbers, fractions, equations and functions. Three original worked examples.

[MetaUniver.xyz](https://metauniver.xyz/en/subjects/math/)

Calculate, compare and explain your reasoning. Starter lessons introduce selected topics from arithmetic to functions.

The starter bank has 33 lessons and 99 tasks: one lesson per subject for each of grades 1–11. This is an introductory set of topics.

The content has not been reviewed by an educational specialist. Its alignment with school grades requires a separate review.

The main learning content in the game is in Russian. The interface and public pages are available in Russian and English.

## Starter lesson topics

- Grade 1: Addition, subtraction and shapes
- Grade 2: Multiplication, division and length units
- Grade 3: Fractions of a number and perimeter
- Grade 4: Area and fractions
- Grade 5: Decimals, percentages and volume
- Grade 6: Negative numbers, fractions and proportions
- Grade 7: Equations, expressions and angles
- Grade 8: Roots, quadratic equations and triangles
- Grade 9: Sequences and probability
- Grade 10: Trigonometry, powers and logarithms
- Grade 11: Derivatives, integrals and a function minimum

## Worked examples

### Grade 3

How many centimetres is the perimeter of a rectangle with sides of 4 cm and 7 cm?

**Answer:** 22

A rectangle has two 4 cm sides and two 7 cm sides. Add them: 4 + 7 + 4 + 7 = 22 cm.

### Grade 7

Solve the equation 4x + 3 = 19.

**Answer:** 4

Subtract 3 from both sides: 4x = 16. Divide both sides by 4: x = 4. Check: 4 × 4 + 3 = 19.

### Grade 10

For which x is 3ˣ = 81?

**Answer:** 4

Multiply: 3 × 3 × 3 × 3 = 81. Therefore 81 = 3⁴ and x = 4.

## Sources and limitations

[Federal work programmes — topic references](https://edsoo.ru/rabochie-programmy/)

The programme links provide topic references. These are original public examples; verified alignment with the programmes is not claimed.

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