Adding Decimal Numbers 12.6 + 4 + 0.24 + 100 Whole numbers Keep decimal points in line Line up whole numbers carefully Fill up spaces with zeros . 12.6 . 4 . 0.24 . 100 . 1 1 6 8 4 add

Adding Decimal Numbers 3.04 + 20 + 0.5 + 1 Whole numbers Keep decimal points in line Line up whole numbers carefully Fill up spaces with zeros . . . . . add

Subtracting Decimal Numbers 70.3 – 8.46 Whole numbers Keep decimal points in line Line up whole numbers carefully Fill up spaces with zeros Borrow from next available number 1 2 69 . 70.3 1 . - 8.46 . 6 1 8 4 subtract

Subtracting Decimal Numbers 2300.3 – 43.99 Whole numbers Keep decimal points in line Line up whole numbers carefully Fill up spaces with zeros Borrow from next available number . . - . subtract

Multiplying Decimal Numbers 32.46 x 4.3 32.46 x 4.3 3246 x 43 2 dp 1 dp 9 7 1 3 1 8 = 3dp 12 9 1 8 4 2 Ignore decimal points Multiply Count total decimal places in question Put decimal point into answer 1 3 1 9 1 5 7 8 

Multiplying Decimal Numbers 4.2 x 1.3 Ignore decimal points Multiply Count total decimal places in question Put decimal point into answer

Dividing Decimal Numbers . 9.28 ÷ 0.4 ÷ 2 3 2 . 1 4 9 2 8 dividend divisor . . 9 2 8 4 Change divisor to a whole number by moving decimal point Move decimal point in dividend same number of places Set out division keep decimal points in line

Dividing Decimal Numbers 31 ÷ 0.25 dividend divisor Change divisor to a whole number by moving decimal point Move decimal point in dividend same number of places Set out division keep decimal points in line