Worksheet: Missing Numbers in Addition and Subtraction Equations

In this worksheet, we will practice finding any unknown in an addition or subtraction equation and describe multiple possible ways to fill in two missing numbers with numbers up to 100.

Q1:

Fill in the blank: 7=8.

Q2:

Fill in the blank: 17=14.

Q3:

Choose the two numbers that make the equation true.

  • A15, 14
  • B13, 7
  • C18, 14
  • D14, 13
  • E14, 3

Q4:

Here are some counters with numbers:

Choose the two numbers that make the equation true.

  • A16, 11
  • B11, 5
  • C15, 11
  • D16, 5
  • E7, 2

Q5:

Find the missing number in 5+=13.

Q6:

Fill in the blank: +9=16.

Q7:

What is the missing number 21+=71?

Q8:

46=22.

Q9:

59=31.

Q10:

Fill in the blanks.

  • A5, 15, 25, 52
  • B5, 16, 26, 53
  • C5, 10, 15, 42
  • D5, 15, 25, 37

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