Concepts
Adding Decimals
Subtracting Decimals
Adding Negative and Positive Decimals
Subtracting Negative and Positive Decimals
100
What is Step to One Adding and Subtracting Decimals?
Align the Decimals
100
4.56 +5.89 =
10.45
100
6.25 - 4.32 =
2.02
100
-23.32 + -24.01 =
-47.33
100
-12.34 - (-56.43) =
44.09
200
What do you do when Adding or Subtracting Decimals with Unlike Signs?
Subtract the Absolute Values of the Addends
200
2.81 + 1.45 =
4.26
200
89.32 - 76.50 =
12.82
200
-10.32 + -23.76 =
-34.08
200
-23.64 - (-34.32) =
10.68
300
When You Subtract Decimals you?
Add The Opposite
300
15.6 + 4.9 =
20.5
300
23.564 - 21.397 =
2.167
300
-49.32 + 34.54 =
-14.78
300
-45.98 - 2.43 =
-48.41
400
What do you do when a Decimal Has Zeros at the end?
You remove them
400
3.14 + 6.39 =
9.53
400
9.68 - 7.25 =
2.43
400
-1.56 + 56.45 =
54.89
400
3.23 - (-7.65) =
10.88
500
How do you check your work?
If its subtraction you add the sum with the bottom number. If its addition you subtract the sum by the bottom number.
500
4.94 + 7.87 =
12.81
500
32.298 - 14.652 =
17.646
500
45.54 - 9.54 =
36
500
45.54 - (-54.78) =
100.32
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