So can we find an easy way to add numbers that end in 9.
Can we come up with a rule?
What could we do to make adding numbers ending in 8 or 7?
November 22, 2017 at 11:43 am
To add numbers that end in 9
First we add 1 to make the ones column = 0
Then we do the calculation to find the answer.
But we need to take away 1 to get the correct answer.
164 + 59
add 1 to 59 to make 60
then do 164 + 60 = 224
finally take away 1 from 224 to get correct answer which is 223
Ayan, Milana, Rayaan, Mohammed and Alamin
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