Grade 2 Math

Missing numbers

Missing numbers helps children practise practising missing numbers with grade-2 arithmetic tasks. Read the short guide, solve one browser task, and print a fresh worksheet when more repetition is useful.

How to solve this

  • Read the missing numbers task carefully and underline the numbers you already know.
  • Look for the relationship: the same total can be written in several ways, and a missing part can be found by the opposite operation.
  • After solving, check whether the answer fits the number range and the question.

Examples

37 + __ = 45

8

__ - 16 = 29

45

What children practice

  • Missing numbers
  • missing numbers
  • inverse operations
  • comparing results before choosing a sign

Practice online

Try one short exercise in the browser.

Printable worksheet

Create a fresh printable worksheet with an answer key for extra practice on paper.

Related topics

Back to Grade 2 Math Previous topic: Two-digit ± two-digit, with regrouping Next topic: Inverse operations
Inverse operationsCompare expressionsCalculation snakes (mixed)

FAQ

What should children know before missing numbers?

It helps if children are comfortable with addition and subtraction facts to 20.

What can we do if missing numbers feels hard?

Look for the relationship: the same total can be written in several ways, and a missing part can be found by the opposite operation.

How much practice is enough?

A focused round of 5 to 10 minutes is usually enough for second graders. Stop while the child can still explain one step clearly.