Order of operations and formulae
Grade 6: brackets first, multiply and divide before add and subtract, work out a simple formula, letters standing for numbers, missing number equations.
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Questions
What is (6 + 4) × 3?
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- 18
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- 30
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30What is 20 − (8 + 2)?
- 10
- 14
- 30
- 6
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10In 5 × (3 + 2), you work out the brackets first, so the answer is 25. (True or false?)
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TrueWhat is 4 + 3 × 5?
- 19
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- 35
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19What is 18 − 12 ÷ 3?
- 14
- 15
- 2
- 6
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142 + 6 × 4 has the same value as (2 + 6) × 4. (True or false?)
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FalseWhat is (15 − 3) ÷ 4 + 2?
- 11
- 3
- 5
- 8
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5A formula is area = length × width. What is the area when length is 7 and width is 4?
- 11
- 14
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- 28
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28If n = 5, what is the value of 3n + 2?
- 10
- 17
- 32
- 35
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17If a = 6 and b = 3, what is the value of a − b + 10? (Answer out loud)
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13In the expression 4x, what does the letter x stand for?
- A bracket
- A number
- A shape
- A unit only
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A numberWhat is 2 × (9 − 4) + 3 × 4? (Answer out loud)
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22Which number makes this true: 7 + ? = 15?
- 22
- 7
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8Find the missing number: 4 × ? − 3 = 17 (Answer out loud)
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5If y + 9 = 20, then y = 11. (True or false?)
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TrueThe perimeter of a square is P = 4 × s. What is s when P = 36?
- 144
- 32
- 8
- 9
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9