Solve the Equation: Finding Missing Number in 87 + □ = 92

Question

Solve the following equation,

using two jumps on the number line below:

87+=92 87+\Box=92

878787929292

Step-by-Step Solution

To solve the problem of 87+=92 87 + \Box = 92 by using two jumps on the number line, we begin by identifying and making our jumps:

  • First jump: Move from 87 to the nearest round number, which is 90. This jump is of size 9087=3 90 - 87 = 3 .
  • Second jump: Now move from 90 to 92. This jump is of size 9290=2 92 - 90 = 2 .

Add the two jumps together:
First jump: 3
Second jump: 2
Total jump: 3+2=5 3 + 2 = 5

Therefore, the value of the box (\Box) that satisfies the equation 87+=92 87 + \Box = 92 is =5 \Box = 5 .

Answer

5 5