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You owe your friend $12. What integer shows this?
−12
What do sum and difference mean in math?
Sum: the answer when you add; difference: the answer when you subtract
Start at −3 on a number line. Move left 7 spaces. Write a subtraction equation.
−3 − 7 = −10
Calculate −6 + (−3).
−9
Calculate 9 + (−4).
5
Calculate −5 − (−9).
−5 + 9 = 4
Your score goes down 14 points to 68. Then it goes up 5 points. What was your score at the start? What is it now?
At the start: 68 + 14 = 82; now: 68 + 5 = 73
A diver swims down 11 meters. What integer shows how far and in which direction the diver must swim to return to the start?
+11 — swim up 11 meters
Calculate 18.75 − 6½ + 9.
18.75 − 6.50 + 9 = 21.25
Calculate −17½ + 12.25 − 3.
−17.50 + 12.25 − 3 = −8.25
How are terminating and repeating decimals different? Give one example of each.
A terminating decimal ends: 0.25; a repeating decimal repeats forever: 0.333…
Write 2 3/10 as a decimal.
2.3
Write 7/16 as a decimal. Show your work.
7 ÷ 16 = 0.4375
Is 6 4/11 greater or less than 6.35?
6 4/11 = 6.363636… which is greater than 6.35
