Unit 9 – The four operations
Working with multiplication
What does this array show?
100 100
10 10 10
10
1 1 1
100 100
10 10 10 10
1 1 1
100 100
10 10 10 10
1 1 1
What is the total value of each part? What is the total value of the array? Talk about how you can work this out.
1 Look at the two different methods used to solve 243 × 3. What is the same and what is different about them? H T O
3 ones × 3 = 9 ones
243 × 3 =
2 4 3
4 tens × 3 = 12 tens or 1 hundred and 2 tens
200 × 3 = 600 ×
3
40 × 3 = 120
7 2 9
2 hundreds × 3 = 6 hundreds plus 1 hundred is 7 hundreds
3×3= 9+ 1 729
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04/05/2022 15:50
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