1. Katherine is very interested in cryogenics (the science of very low temperatures). With the help of her science teacher she is doing an experiment on the affect of low temperatures on bacteria. She cools one sample of bacteria to a temperature of -51°C and another to -76°C. What was the temperature difference in the two experiments?
-25°C
100
True or False. If false, correct the statement.
The product of two negative integers is negative.
False- the product of two negative integers is positive.
100
10 x (-2)
-20
100
30 / -3
-10
100
(17+3)÷(-5)=
-4
200
On Tuesday the mailman delivers 3 checks for $5 each and 2 bills for $2 each. If you had a starting balance of $25, what is the ending balance?
36 dollars
200
True or False. If false, correct the statement.
Zero is a neutral integer. It can either be positive OR negative.
False. Zero is neither positive or negative.
200
25x-4
-100
200
-30÷2
-15
200
(-23-8)x2
-62
300
During the football game, Justin caught three passes. One was for a touchdown and went 52 yards. The other was for a first down and was for 17 yards. The other was on a screen pass that did not work so well and ended up a gain of -10 yards. What was the total yardage gained by Justin on the pass plays?
59
300
True or False. If false, correct the statement.
Zero is greater than every positive integer.
False. Zero is smaller than every positive integer and larger than every NEGATIVE integer.
300
-15 x -4
60
300
-272/17
-16
300
16÷2x (-9)
-72
400
A monkey sits on a limb that is 25 ft above the ground. He swings up 10 ft, climbs up 6 ft more then jumps down 13 ft. How far off the ground is the monkey now?
28 ft
400
True or False. If false, correct the statement.
2 + (3-4) + 15 ÷ 3 x 9 = 41
False.
400
234 x (-91)
-21294
400
6300 / -90
-70
400
(36+(-23))x10^2
1300
500
A submarine dove 836 ft. It rose at a rate of 22 ft per minute. What was the depth of the submarine after 12 minutes?