Multiplication Number Sentences
LI: To use multiplication to solve story problems.
a) Hohepa worked in a store for 16 hours a week for 7 weeks over Christmas. Show how to work out how many hours he worked over that time.
16 x 7 = 112
10 x 7 = 70
6 x 7 = 42
70 + 42 = 112
112 hours
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b) Paddy worked 14 hours per day as a security guard. He worked for 23 days.
Show how to work out how many hours he worked over that time.
14 x 23 = 212
10 x 20 = 200
4 x 3 = 12
200 + 12 = 212
212 hours
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c) James and Maraea dug 32 post holes per day on their farm. They worked for 27 days. Show how to work out how many post holes they dug.
32 x 27 = 1214
30 x 20 = 1200
2 x 7 = 14
1200 + 14 = 1214
1214 post holes
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d) 38 people worked for 195 days in the year. Show how to work out how many days they worked together during the year.
38 x 195 =
30 x 100 = 3000
8 x 95 = 760
3000 + 760 = 3760
3760 days
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