Addition
-8 + 5
-3
-8 - 7
-15
9 x -2
-18
-100/-5
20
10 - (-11)
21
5.2 + - 9.05
-3.85
-25.2 - 5.23
-30.43
2.1 x -6.24
-13.104
-1.56/1.2
-1.3
How do you determine the sign of the answer when adding and subtracting rational numbers?
Whichever number has the higher absolute value, the answer will have that sum.
-1/4 + -4/9
-25/36
8/9 - (-5/6)
1 13/18
1/10 x -5/11
-1/22
-1/6 divided by -2/3
1/4
What will the sign of the product be if you are multiplying
-6 x 5 x -1 x -9
Negative
9 1/2 + -3/4
8 3/4
2 1/8 - (-1/4)
2 3/8
-4 1/4 x 2/3
-2 5/6
1 3/4 divided by -1 1/8
-1 5/9
What is the relationship between these two numbers?
1/4 and 4/1
Reciprocals
Miranda is going to the store for school supplies. She bought 3 notebooks for $1.25 each, 2 packs of pencils for $.75 each, and a box of crayons for 3.75. How much money did Miranda spend in total?
$9
You are on a roller coaster that is 1/5 mile above ground. It then descends 1/2 mile. What is the new location of the roller coaster after descending?
3/10 mile below ground.
Or -3/10
Your teacher gives you a worksheet with 20 problems on it. She tells you to complete 3/4 of the sheet. How many problems do you need to complete?
15
3 girls babysat a family of children for a night. They received $45.75 total for their time. How much money did each girl receive?
$15.25
Bailey has two Great Dane puppies. At 6 weeks old, Harry weighs 12.5 pounds and Ralph weighs 15.23 pounds. At 12 weeks, both puppies together weighed 38.5 pounds. How much weight did the puppies gain altogether from 6 weeks to 12 weeks?
10.77 pounds