The first thing you have to do to a subtraction problem is change it to ________.
addition
100
What is a negative times a negative?
Positive
100
What is a negative divided by a positive?
negative
100
|35|
35
200
-14 + 35
21
200
-18 - 12
-30
200
13 x 7
91
200
45 ÷ 15
3
200
|-20|
20
300
Fill in the blanks:
Same sign _____ and ______. Different signs ________. Keep the sign of the __________ number then you'll be ________.
add, keep, subtract, bigger, exact
300
87 - (-21)
108
300
-9 x 5
-45
300
24 ÷ (-3)
-8
300
Absolute value tells you how far away a number is from ______.
zero
400
23 + (-52)
-29
400
-9 - (-34)
25
400
10 x -10
-100
400
-52 ÷ 2
-26
400
|4+11| - |10-5|
10
500
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
500
A submarine was 450 feet below sea level. If it descends 300 feet, what is its new position?