Lesson videos test

Multiplication comes before addition. 2 × 6 = 12, then 5 + 12 = 17. Adding first (5 + 2 = 7, then 7 × 6) gives 42, which is wrong.

Division and multiplication have the same priority, so work from left to right. 18 ÷ 3 = 6, then 6 × 2 = 12.

Brackets come first. 9 − 3 = 6, then 4 × 6 = 24, then 24 + 1 = 25.

Orders (squares) come before subtraction. 3² = 3 × 3 = 9, then 20 − 9 = 11.

Addition and subtraction have the same priority, so work from left to right. 10 − 4 = 6, then 6 + 3 = 9. Adding first (4 + 3 = 7, then 10 − 7) gives 3, which is wrong.

Brackets: 2 + 4 = 6. Orders: 6² = 36. Division: 36 ÷ 3 = 12. Subtraction: 12 − 5 = 7.

Squared means a number times itself. 7² is 7 × 7, which is 49. 14 is 7 × 2, which is a common slip.

Brackets first: 3 + 2 = 5. Then the square: 5 × 5 = 25. 13 comes from squaring each number on its own (9 + 4), which skips the brackets.

Brackets first: 6 − 2 = 4. Orders next: 4² = 16. Last, add: 16 + 3 = 19. 49 comes from adding the 3 before squaring.

Inside the brackets, BODMAS still applies, so the square comes before the add: 3² = 9, then 1 + 9 = 10. Last, multiply: 4 × 10 = 40. 64 comes from adding 1 + 3 first and then squaring.

Work out each one. (2 + 8)² is 10², which is 100. 2 + 8² is 2 + 64 = 66. 2² + 8² is 4 + 64 = 68. 2 × 8² is 2 × 64 = 128. Only (2 + 8)² makes 100.

Start inside the brackets, using BODMAS there too: 2² = 4, then 10 − 4 = 6. Then square the bracket: 6² = 36. 64 comes from doing 10 − 2 first, and 96 comes from forgetting to square the bracket.