Written Calculation Methods
Master the formal written methods of columnar subtraction, including subtracting numbers with up to 4 digits and solving problems involving decimals. Practice key number facts and bonds to support learning. Explore various subtraction scenarios with whole numbers, including exchanging across different place values.
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Presentation Transcript
Written Calculation Methods Subtraction
Subtraction Year 3 Subtract numbers with up to 3 digits, using formal written method of column subtraction Subtract numbers with up to 4 digits using the formal written method of columnar subtraction where appropriate. Solve simple measure and money problems involving decimals to two decimal places. Subtract whole numbers with more than 4 digits, including using formal written methods. Solve problems involving number up to three decimal places No new learning apply subtraction to larger numbers. Year 4 Year 5 Year 6
Key Number Facts Number Bonds Practising these facts at home is a key way to support your child For most addition facts, there are two related subtraction facts: 6 + 4 = 10 3 + 3 = 6 6 + 7 = 13 10 4 = 6 10 6 = 4 6 3 = 3 13 7 = 6 13 6 = 7
Subtraction Whole Numbers 1 7 4 6 8 4 2 - Line up the ones digits in each number
Subtraction Whole Numbers 1 7 4 6 8 4 2 2 - Exchange 1 hundred for 10 tens
Subtraction Whole Numbers 1 6 1 7 4 6 8 4 2 2 -
Subtraction Whole Numbers 1 6 1 7 4 6 8 8 4 2 2 -
Subtraction Whole Numbers 1 6 1 7 4 2 6 8 8 4 2 2 - 1
Subtraction Whole Numbers with exchange across 0 6 2 0 4 0 8 7 9 - As there are no tens or hundreds, we have to exchange 1 thousand for 10 hundreds
Subtraction Whole Numbers with exchange across 0 5 1 6 2 0 4 0 8 7 9 - Then 1 hundred for 10 tens
Subtraction Whole Numbers with exchange across 0 9 1 5 1 6 2 0 4 0 8 7 9 - Then 1 ten for 10 ones
Subtraction Whole Numbers with exchange across 0 9 9 1 1 5 1 6 2 0 4 0 8 7 9 -
Subtraction Whole Numbers with exchange across 0 9 9 1 1 5 1 6 2 3 0 4 5 0 8 1 7 9 8 -
Subtraction - Decimals 3.5 - 1.46 = . . . 3 1 5 4 0 6 - The decimal points are lined up, including one in the answer. 0 is used as a place holder.
Subtraction - Decimals 3.5 - 1.46 = . . . 4 1 3 1 5 4 0 6 -
Subtraction - Decimals 3.5 - 1.46 = . . . 4 1 3 1 2 5 4 0 0 6 4 -
