Adding Rational #'s
-8 + -11
-19
-11 + 3
-8
If the signs are the same, _____ and use the same sign.
add
4.5 x 3
13.5
-3/10 / -4/5
3/8
-3.7 + -6.5
-10.2
8.2 + -17.6
-9.4
Fill in the blank:
When subtracting, we will use the ______ ______
to add the opposite.
additive inverse
-15.6 x -2
31.2
-8/9 / -4/9
2
-5 + -14
-19
5/8 - 3/4
-1/8
If the signs are _______, _______ and take the sign of the number with the greatest absolute value.
different, subtract
-11.8 x -5
59.0
1 3/8 / 1/8
11
-6/11 + -3/11
-9/11
On Monday Melody checks her bank balance and has $437.23. She knows that she will get paid on Friday and earn $236.12. She pays her bills which amount to $582.96. What will Melody's bank balance be after she pays her bills and gets her paycheck?
$90.39
The _____ for fractions is the same; it just requires more steps.
process
7/8 x 1 1/2
1 5/16
2 3/4 / 2/3
4 1/8
During a drought the local lake was 2 1/4 feet below normal levels. Two weeks later, the water level had dropped an additional 1 3/8 feet. How far below the normal level was the water after two weeks?
-3 5/8
Jonathon borrowed $800 from his grandparents to start a lawn mowing business in his neighborhood. After mowing lawns for a month and paying his expenses, he was able to pay them $188.56. How much does Jonathon still owe his grandparents?
$611.44
Rewrite the problem to add the _______. Then follow the ruled for adding.
opposites
2 1/2 x -3/4
-1 7/8
-2/3 / 1/2
-1 1/3