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**Parents Guide to Long Multiplication**

This Power Point Presentation will Show Parents the Language We Use When Teaching Children Long Multiplication

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**Introducing Long Multiplication**

We introduce long multiplication first of all by looking at multiplying by 20, 30, 40 etc. Example X x30

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**Always multiply by the units first:**

54 X 20 We say, “54 multiplied by zero.” Then we say, “54 multiplied by 2.”

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Multiplying by 20 5 4 x 20 We introduce this calculation by saying: 54 multiplied by zero is zero. When we multiply by zero the answer is always zero! Put your zero in the answer. Now we multiply 54 by 2. We say 2 fours are 8. Put down your 8. Now we say 2 fives are 10. This is the end of the sum so put down the 10 in the answer. 10 8

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**Example 2 4 6 x 20 2 9 We introduce this calculation by saying:**

4 6 x 20 We introduce this calculation by saying: 46 multiplied by zero is zero. When we multiply by zero the answer is always zero! Put your zero in the answer. Now we multiply 46 by 2. We say 2 sixes are 12. Put down your 2 and carry your 1. Now we say 2 fours are 8 add 1 is 9. This is the end of the sum so put down the 9 in the answer. 9 2 1

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**Remember: when we multiply by zero, the answer is always zero!**

Try These: 52 X 20 48 X 40 29 X 30 95 34 83 94 28 X 50 X60

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**Long multiplication is really 3 sums in one!**

Step 1 Step 2 Step 3 32 X 23 X 3 96 X 20 640 +640 Long multiplication is really 3 sums in one! Step 1: multiply the top number by the units digit in the bottom number. Step 2: Multiply the top number by the tens digit in the bottom number. Step 3: add your two answers.

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**Be careful with your place value!**

To remind us to keep the figures in the correct place, we talk about the magic 0! 46 X23 Multiply 46 by 3 Put in your magic nought! Now do 46 multiplied by 2 Finally add your two answers together! Notice that without your magic nought the digits 9 and 2 would not be in the correct place & your answer would be incorrect.

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**Remember: Long multiplication is really 3 sums in one!**

Now try these: 76 X23 82 X46 93 X54 32 X 41 46 X 54 64 X 32 Remember: Long multiplication is really 3 sums in one! Step 1: multiply the top number by the units digit in the bottom number. Step 2: Multiply the top number by the tens digit in the bottom number. Step 3: add your two answers.

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**Click Below to Return to Our School Website.**

We hope this powerpoint will help you to work with your child at home. Please ask in school if you have any questions regarding our approach to teaching maths.

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