Solve Addition Equation: Find Missing Number in 33 + □ = 42

Solve the addition exercise,

using two jumps on the number line below:

33+=42 33+\Box=42

333333424242

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Step-by-step written solution

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1

Understand the problem

Solve the addition exercise,

using two jumps on the number line below:

33+=42 33+\Box=42

333333424242

2

Step-by-step solution

To solve the problem 33+=42 33 + \Box = 42 using the number line, we will make strategic jumps:

First, jump from 33 to the nearest higher round number, which is 40:

  • This first jump is 4033=7 40 - 33 = 7 .

Next, jump from 40 to 42:

  • This second jump is 4240=2 42 - 40 = 2 .

Add the two jumps to find \Box:

  • =7+2=9\Box = 7 + 2 = 9

Therefore, the solution to the problem is 9 9 .

3

Final Answer

9 9

Practice Quiz

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If we have 67 blocks in total, how many blocks will remain if we remove 5 tens and 4 ones?

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