Question

complete to solve $8 + 84$.
$8 + 84$
$= (2 + \square) + 84$
$= 2 + (\square + 84)$
$= 2 + \square$

Explanation:

Step1: Decompose 8

We know that \( 8 = 2 + 6 \), so we substitute 8 with \( 2 + 6 \) in the expression \( 8 + 84 \).
\( 8 + 84=(2 + 6)+84 \)

Step2: Apply Associative Property

The associative property of addition states that \( (a + b)+c=a+(b + c) \). So we can rewrite \( (2 + 6)+84 \) as \( 2+(6 + 84) \).

Step3: Calculate \( 6 + 84 \)

Calculate the sum inside the parentheses: \( 6+84 = 90 \).

Step4: Calculate \( 2+90 \)

Now we add 2 and 90: \( 2 + 90=92 \).

Answer:

The first box is \( 6 \), the second box is \( 6 \), the third box is \( 90 \), and the final result of \( 8 + 84 \) is \( 92 \). (Filling the boxes in order: \( 6 \), \( 6 \), \( 90 \), and the last sum is \( 92 \))