I have learnt that in different countries people work much harder than we do to get water every day.
Exercise 1
What to do
Use the information given to you to derive the answer to a similar problem.
- If 9 × 20 = 180 what is 9 × 21 ? 189
- If 8 × 30 = 240 what is 8 × 31 ?248
- If 4 × 40 = 160 what is 4 × 42 ?168
- If 5 × 50 = 250 what is 5 × 51 ?255
- If 3 × 60 = 180 what is 3 x 62 ?186
- If 2 × 70 = 140 what is 2 × 73 ?146
- If 4 × 80 = 320 what is 4 × 82 ?328
8) If 2 × 90 = 180 what is 2 × 94 ?188
Exercise 2
What to do
Use the information given to you to derive the answer to a similar problem.
1) If 9 × 20 = 180 what is 9 × 19 ?171
2) If 8 × 30 = 240 what is 8 × 29 ? 232
3) If 7 × 40 = 280 what is 7 × 39 ?273
4) If 5 × 50 = 250 what is 5 × 49 ?245
5) If 3 × 60 = 180 what is 3 × 58 ?174
6) If 2 × 70 = 140 what is 2 × 67 ?134
7) If 4 × 80 = 320 what is 4 × 78 ?156
8) If 2 × 90 = 180 what is 2 × 86 ?162
Exercise 3
What to do
Use the information given to you to derive the answer to a similar problem.
- If 9 × 20 = 180 what is 9 × 22 224?
- If 7 × 30 = 210 what is 7 × 32 203?
- If 5 × 40 = 200 what is 5 × 43 197?
- If 4 × 50 = 200 what is 4 × 51 204?
- If 3 × 60 = 180 what is 3 × 61 183?
- If 6 × 70 = 420 what is 6 × 73 338?
- If 6 × 80 = 480 what is 6 × 81 230?
8) If 8 × 90 = 720 what is 8 × 92 736?
Exercise 4
What to do
Use the information given to you to derive the answer to a similar problem.
- If 9 × 20 = 180 what is 9 × 18 162?
- If 7 × 40 = 280 what is 7 × 37 159?
- If 5 × 40 = 200 what is 5 × 38 190?
- If 4 × 50 = 200 what is 4 × 47 188?
- If 3 × 60 = 180 what is 3 × 56 168?
- If 6 × 70 = 420 what is 6 × 67 402?
- If 6 × 80 = 480 what is 6 × 78 468?
8) If 8 × 90 = 720 what is 8 × 88 704?
During numeracy I have been learning new strategies to solve multiplication problems.
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