1. Addition, Subtraction, Multiplication, Division by a whole number, and Division by a decimal

2.  Line up the all decimal points.  Add. 2 5. 3 9. 7 2 0. 6 1 8 3 5 ∙ 6 3 8

3.  Line up the all decimal points.  Add zeros as place holders  Subtract 1 2. 5 1 2. 5 0 - 9. 2 6 rewritten - 9. 2 6 3. 2 4

4.  Line up digits to be multiplied with decimals.  Multiply.  Count the total number of decimal places in the factors to find out how many decimal places the product has.

5. 2 decimal places 1. 2 9 1 decimal place x 6. 2 2 5 8 7 7 4. 3 decimal places 7. 9 9 8 Estimate to check: 1.29 rounds down to 1. 6.2 rounds down to 6. 1 X 6 = 6 This product makes sense – the product is close.

6.  Divide.  Put the decimal point in the quotient directly above the decimal point in the dividend. 3 8. 7 6

7. - 6. 2 7 - 2 7. 0 6 - 6 0 3 8. 7 6 2. 9 2

8.  Estimate to check. 8. 7 6 is close to 9 9 ÷ 3 = 3 3 is close to 2. 9 2 The quotient makes sense.

9.  Step 1 - move the decimal point in the divisor to the right to make a whole number. 0. 3 4. 8 6

10.  Step 2 – move the decimal point in the dividend the same number of places as in the divisor. 3 4. 8 6

11.  Step 3  Divide  Put the decimal point in the quotient above the decimal point in the dividend. 1 6. 2 3 4 8. 6