Mental Math Within 20 Worksheets Grade 2

Mathematics

Mental Addition/Subtraction

Each printable worksheet below is a full page of practice problems and comes with an answer key that explains how to solve every problem, step by step. Open a worksheet and use the Print / Save as PDF button to download it.

Worksheet 1

8 problems
  1. Liam has 24 stickers in his collection. His friend Emma gives him 15 more stickers for his birthday. How many stickers does Liam have now?
  2. Lily has 47 crayons in her art box. Her teacher gives her 28 more crayons for a special project. How many crayons does Lily have now?
  3. A rectangle has 4 rows of stickers with 6 stickers in each row. How many stickers are there in total?

…and 5 more problems

Open & Print Worksheet 1

Worksheet 2

10 problems
  1. 63 - 28 = ?
  2. Charlotte has a number path that shows jumps of 10. She starts at 27 and jumps forward 3 times. What number does she land on?
  3. 75 + 26 = ?

…and 7 more problems

Open & Print Worksheet 2

Worksheet 3

7 problems
  1. Jordan is collecting seashells. Jordan has 16 shells. Jordan finds 43 more on the beach. How many shells does Jordan have in all?
  2. A baker had 75 cookies in the morning. She baked 24 more cookies in the afternoon. How many cookies does she have now?
  3. A rectangular garden has 7 rows of flowers. Each row has 8 flowers. How many flowers are there in total?

…and 4 more problems

Open & Print Worksheet 3

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