AC Lim's answer to Wesley wan's Primary 5 Maths Whole Numbers Singapore question.
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201 is when we pair the 2 number together.
Example...
1 + 200 = 201
2 + 199 = 201
3 + 198 = 201
4 + 197 = 201
5 + 196 = 201
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100 + 101 = 201 (last pair of number)
Total have 100 pair.
So, working = 100×201 = 20100.
Example...
1 + 200 = 201
2 + 199 = 201
3 + 198 = 201
4 + 197 = 201
5 + 196 = 201
.
.
.
.
.
100 + 101 = 201 (last pair of number)
Total have 100 pair.
So, working = 100×201 = 20100.
Date Posted:
2 years ago
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