Grade 8 · Math · Unit 3 of 18
Integer Operations
Multiply, divide and mix
What your child practises
Multiplying and dividing positive and negative integers, adding and subtracting them, working with the order of operations, and solving real-life problems such as temperature changes.
Ontario Curriculum expectation: B2.1, B2.4, B2.7 · adding, subtracting, multiplying and dividing integers, and the order of operations
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
Multiply.
(−2.5) × (−14) = ?
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35
Hint: Multiply the numbers as if they were positive, then fix the sign.
Question 2
Divide.
25 ÷ (−5) = ?
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-5
Hint: Divide the numbers, then use the same sign rules as multiplying.
Question 3
Divide.
(−55) ÷ (−5) = ?
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11
Hint: Divide the numbers, then use the same sign rules as multiplying.
Question 4
Use the order of operations.
−8 + 1 × 11 = ?
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3
Hint: Multiply before you add.
Question 5
Multiply.
(−11) × 4 = ?
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-44
Hint: Multiply the numbers, then use the signs: two negatives make a positive; one negative makes a negative.
Question 6
A diver is 44 m below the surface, at −44 m. She swims up 6 m each minute for 7 minutes. Where is she now, in metres?
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-2 m
Hint: She rises 6 × 7 = 42 m, so add 42 to −44.