Question

Describe how to use a tens fact to find the difference for 15-8

Answer 1

I subtracted 15-8 gave me 7 then I took
10- my answer which was 7 
10-7= 3

Answer 2

Making a ten involves splitting one of the values to be subtracted such that we arrive at a value of 10 first, before subtracting the remainder to obtain the final result.

• (15 - 5) - 3 = 10 - 3 = 7

To solve the subtraction equation by making a 10, we could follow the following steps :

• 15 - 8

• Decomposing 8 into two Seperate values; such that subtracting one of the values from 15 gives 10

• Decomposed value of 8 = (5 and 3)

• 15 - 5 = 10 ;

• Then, we subtract the second value from 10 to give ; (10 - 3) = 7

Therefore, summarily, we have ;

15 - 8

15 - [5 + 3] ;

15 - 5 = 10 ;

10 - 3 = 7

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