Let’s Practise
1 Use the column method to multiply 15 × 27 and 27 × 15. Before you start, predict what rows will be the same, and which rows will be different.
2
7
1
5
×
1
5
×
2
7
+
+
(a) 45 × 15 =
(b) 71 × 17 =
2
(c) 63 × 27 =
(d) 32 × 82 =
3 A coach can carry 32 people. How many people can 14 coaches carry?
The children in Class 5 are making dodecagons from matchsticks. There are 26 children in the class. The teacher has 300 matchsticks. Does the teacher have enough matchsticks for one each?
4
A decagon has 12 sides.
E
Find the answers to these using a column method: 23 × 11 43 × 11 71 × 11 What pattern can you see in the answers? Can you find an example that doesn’t have this pattern in the answer?
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01/12/2021 14:51
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