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

 Line up the all decimal points.  Add ∙ 6 3 8

 Line up the all decimal points.  Add zeros as place holders  Subtract rewritten

 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.

2 decimal places decimal place x decimal places Estimate to check: 1.29 rounds down to rounds down to 6. 1 X 6 = 6 This product makes sense – the product is close.

 Divide.  Put the decimal point in the quotient directly above the decimal point in the dividend

 Estimate to check is close to 9 9 ÷ 3 = 3 3 is close to The quotient makes sense.

 Step 1 - move the decimal point in the divisor to the right to make a whole number

 Step 2 – move the decimal point in the dividend the same number of places as in the divisor

 Step 3  Divide  Put the decimal point in the quotient above the decimal point in the dividend