1.

Using a latter subtract 9 from 9 a number

Answer»

Answer:

8

Step-by-step EXPLANATION:

This calculation is correct, but it can be SIMPLIFIED by adding together the numbers we are subtracting.  In our example, 8 − 2 − 2 = 4 can be simplified to 8 − 4 = 4 (the TWO 2S have been added together to give 4, which is then SUBTRACTED from 8)



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