Adding, Subtracting, Multiplying, and Dividing

Adding decimals

To add decimals, first line them up with point under point.  Remember that any whole number is understood to have a decimal point at its right.

Example:  2.46 + 0.005 + 16 =
Step 1:  Line up point under point.  Notice the decimal point after the whole number 16.
                2.46
                0.005
            +16.____

Step 2:  Add the numbers.
                2.46
                0.005
            +16.____
              18.465

1. 0.8 + 0.047 + 0.36 =
2. 123 + 2.6 + 9.04 =
3. 9.043 + 0.27 + 15 =
4. 0.849 + 1.6 + 73 =
5. 7.563 + 0.08 + 124.9 = 
6. 12.3 + 0.908 + 6 + 4.25 =
7. 1.6 + 23 + 12.73 + 0.485 =
8. .005 + 12 + 1.2389 =
9. 9.4 + 3.5 + 12.9007 =
10. 0.023 + 0.12 + 0.007 =


Resources:
Building Basic Skills in Mathematics. (1988). NTC/Contemporary Publishing Group, Inc.: Lincolnwood, IL.

Howett, Jerry. (2000). Number Power 2: A Real World Approach to Math. NTC/Contemporary Publishing Group, Inc.: Lincolnwood, IL.

Lassiter, Karen. (1993). Math Matters for Adults: Decimals and Percents. Steck-Vaughn Company: Austin, TX.