Tanaysha was trying to solve 72-8. She said that she could do 72+2=74 and 74-10 to solve. What strategy did she use?

Tanaysha replace 8 by (10 - 2) to solve the given expression.

Step-by-step explanation:

Here, the given expression to be solved is:

72 - 8 ... (1)

Now, as we know: 8 = 10 - 2

Replacing the value of 8 with (10 - 2), we get:

72 - 8

= 72 - (10 - 2)

= 72 - 10 + 2

= (72 + 2) - 10

Now, adding (72) and (2), we get:

= 74 - 10

Subtracting 10 from 74, we get:

= 64

So, Tanaysha replace 8 by (10 - 2) to solve the given expression.