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Lesson · Grade 2 · Mathematics

Even and Odd Numbers: Can Every Sock Find a Partner?

  • Grade 2
  • Mathematics
  • 1 min 3 s
  • British Columbia
  • BC2-MA-04

Eight socks are counted one at a time, put into pairs and counted by 2s to show that every sock has a partner, so 8 is even. Then one more sock makes 9: after pairing, sock 9 is left over, so 9 is odd, and the video ends with "Even numbers make pairs with none left over."

Concept: Even and odd numbers

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In one sentence

The question this lesson answers

Is a number even or odd? Let's find out with some socks.

Let's count the socks: 1, 2, 3, 4, 5, 6, 7, 8.

Transcript

What the lesson says

Is a number even or odd? Let's find out with some socks.

Let's count the socks: 1, 2, 3, 4, 5, 6, 7, 8.

Now put the socks into pairs. A pair is 2 socks together.

Count the socks by 2s: 2, 4, 6, 8.

Every sock has a partner, with none left over.

So 8 is an even number.

Now let's try 9 socks. That is 8 socks and 1 more.

Make pairs again, and count by 2s: 2, 4, 6, 8.

Sock number 9 has no partner. So 1 sock is left over.

So 9 is an odd number.

Even numbers make pairs with none left over.

Odd numbers always have 1 left over.

Curriculum

Where this fits

British Columbia, Grade 2

Mathematics, Number: number concepts to 100BC2-MA-04

Previous: Tens and Ones: What Each Digit in 49 Is WorthNext: How Many Beans? Estimating with a Handful

British Columbia, Grade 3

Mathematics, Number: one-step addition and subtraction equations with an unknown numberBC3-MA-20

Previous: One Array, Two Facts: 3 × 4 = 12 and 12 ÷ 3 = 4

This lesson is also listed in Grade 3.

The outcomes and strands follow the British Columbia curriculum.

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