Question

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$25 + 10 = 35$
so, 15-
write the missing numbers
show your work.

1. $45 - 10 = 10 + 5 + \underline{\quad}$

$45 - 10 = \underline{\quad}$
$35 = 10 + 5 + \underline{\quad}$
so, $45 - 10 = 10 + 5 + \underline{\quad}$.

Explanation:

Step1: Calculate left-hand side

$45 - 10 = 35$

Step2: Sum known right-hand terms

$10 + 5 = 15$

Step3: Solve for missing number

Let $x$ = missing number. $35 = 15 + x \implies x = 35 - 15 = 20$

Answer:

$45 - 10 = 35$
$35 = 10 + 5 + 20$
So, $45 - 10 = 10 + 5 + 20$
The missing number is 20.