Rules
Adding Negative Numbers
Subtracting Negative Numbers
Multiplying Negative/Positive Decimals
Dividing Negative/Positive Decimals
100

How do I write my addition or subtraction of two decimals?

Line up the Decimals

100

-25.68 + (-15.01) = 

-40.69

100

32.5 - 89.64 = 

-57.14
100

6.9 x (-3.2) = 

-22.08

100

-18.56/0.2 = 

-92.8

200

What do you do when Adding or Subtracting Decimals with Unlike Signs?

Subtract the Decimals

200

-54.87 + 28.92 = 

-25.95

200

913.9 - 1103.1 = 

-189.2

200

-19.22 x 2.5 = 

-48.05

200

-9/(-0.45) = 

+20

300

True or False. When you multiply or divide two negative decimals, the answer will stay negative. 

False. The answer will be positive.
300

(-75.134) + 19.2311 = 

-55.9029

300

17.9 - (-19.4) = 

37.3

300

-5.117 x 0.36 = 

-1.84212

300

-64.8/5.4 = 

-12

400

What do you add as "placeholders" when you add/subtract decimals.

Zeros

400

82.11 + (-83.11) =

-1

400

(-15.5) - (-15.5) = 

0

400

36.1 x (-4) = 

-144.4

400

-2.04/(-0.17) = 

+12

500

When adding two decimals with negative signs, you get what kind of answer?

A negative answer.

500

-54 + 16.23 = 

-37.77

500

54 - 221.32 = 

-167.32

500

-2.43 x -4.3 = 

10.449

500

-52.48/0.16 = 

-328

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