Integer Operations
What is -7 + 12?
5
What is 1/2 + 1/4?
3/4
What is -3.5 + 1.2?
-2.3
What is the sign of the answer?
-8 x 6
Negative
The temperature is -4°F. It increases by 9°F. What is the new temperature?
5°F
What is -15 - 8?
-23
What is -3/5 + 1/5?
-2/5
What is 4.8 - (-2.7)?
7.5
What is the sign of the answer?
-15 ÷ -3
Positive
A diver is 18.5 feet below sea level. The diver rises 7.25 feet. What is the diver's new position?
-11.25 feet
What is -6 x -9?
54
What is 2/3 - 5/6?
-1/6
What is -2.5 x 0.4?
-1
What is the reciprocal of -3/7?
-7/3
A bank account has a balance of -$45.50. You deposit $70.25. What is the new balance?
$24.75
What is 72 ÷ -8?
-9
What is -3/4 x 8/9?
-2/3
What is -7.2 ÷ 0.6?
-12
Rewrite this division problem as multiplication:
-2/5 ÷ 3/4
-2/5 x 4/3
A submarine is at -120.5 meters. It descends another 35.75 meters and then rises 50.25 meters. What is its final position?
-106 meters
Work:
-120.5 - 35.75 = -156.25
-156.25 + 50.25 = -106
What is -18 + (-7) - (-12)?
-13
-18 + (-7) = -25
-25 - (-12) = -25 + 12
-25 + 12 = -13
What is -5/6 ÷ 10/9?
-3/4
What is -25% x 80?
-20
Without completely solving, determine whether the answer is positive or negative:
-2/3 x -4/5 x -3/8
Negative
Why?
There are three negative signs.
Three is an odd number, so the product is negative.
A student has $50. They spend 30% of their money on a book. Then they spend $12.50 on lunch. How much money do they have left?
$22.50
Work:
30% of $50 = $15
$50 - $15 = $35
$35 - $12.50 = $22.50