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Aquarium Pairs: Odd and Even Numbers to 20 worksheet preview

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Aquarium Pairs: Odd and Even Numbers to 20

Grade 2 odd and even practice at the aquarium: pair up groups of up to 20 animals, count by 2s, and write even numbers as doubles.

Grade 2MathInteractive · Printable

Aligned to2.OA.C.3

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What’s included

  • Single worksheet
  • Auto-graded online
  • 1 Common Core standard
  • Printable answer key
  • 12 questions
  • Classroom-ready

Details

Format
Interactive · Printable
Grade
Grade 2
Subject
Math
Question types
Fill in the blank, Multiple choice, Matching, Circle the answer, Sorting, Short answer

About this worksheet

What students practice

  • Students decide whether a group of up to 20 objects is odd or even by pairing or counting by 2s.
  • Students write an even number as a sum of two equal addends.

How to use

Give students counters or cubes so they can build each group and pair it up. Do the first sorting problem together, then let students work through the rest on their own.

Curriculum

Common Core standard covered

2.OA.C.3

Decide whether a group of up to 20 objects has an odd or even number of members.

Preview

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Name Date

Aquarium Pairs: Odd and Even Numbers to 20

Pair up sea animals, count by 2s, and use doubles to tell odd from even.

Pair them up

Make pairs. If every animal has a partner, the number is even. If one is left over, the number is odd.

1.
Each card shows the clownfish in one tank. One dot is one fish. Count all the dots on a card and sort that tank as odd or even.
OddEven
2.
There are 14 sea stars in the touch pool. Put them in pairs.

14 sea stars make   pairs with   left over.
So 14 is  .

3.
There are 11 jellyfish in the big tank. Put them in pairs.

11 jellyfish make   pairs with   left over.
So 11 is  .

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