Abigail Wong's answer to Tooh Hong Wei's Primary 6 Maths Measurement Singapore question.
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Answer is 72
10x7 is 70. And additional 2 leftover
72/6 is 12
72/8 is 9
10x7 is 70. And additional 2 leftover
72/6 is 12
72/8 is 9
Date Posted:
5 years ago
Don't really understand. Can explain further?
When divided by 10, there is 2 leftover. So 72 divided by 10, there’s 2 leftover.
72 can be divided by 6 and 8 with no leftover
72 can be divided by 6 and 8 with no leftover
How do you get 72 in first place?
You can do what I did by writing all the multiples of 6 and 8.
But I actually mental sums in my head. 2x10 +2 =22 and See if it can be divided by 6&8. And then 3x10+2 =32, etc. cause it’s easier to see from 10 and add a 2.
But I actually mental sums in my head. 2x10 +2 =22 and See if it can be divided by 6&8. And then 3x10+2 =32, etc. cause it’s easier to see from 10 and add a 2.
Thanks
The easiest way I feel is to see if 22 is divided by 6&8, then 32, 42,53,62,72,82,92. Since multiple of 10+ 2
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