Understanding Doubles

Front

What are doubles?

Back

Doubles result when adding a number to itself.

Front

Example of doubling 3

Back

The double of 3 is 6 since 3 + 3 = 6.

Front

Example of doubling 9

Back

The double of 9 is 18 since 9 + 9 = 18.

Front

Activity with counters and a mirror

Back

You can see the double of 4 by putting 4 counters in front of the mirror and counting both the real counters and their reflections.

Front

Image of counters in front of a mirror showing reflections

Back

Visual representation of using a mirror to double numbers with counters.

Front

Relating other addition situations to doubles can help figure out something else.

Back

Knowing one thing can help you figure out another, like using doubles in addition.

Front

Example of doubles minus one strategy.

Back

4 and 4 makes 8, so 4 and 3 is 1 less, making it 7.

Front

Doubles minus one strategy.

Back

Adding by using a known double and subtracting one.

Front

Helping your child with new words.

Back

Relate doubles to pairs of socks, shoes, or mittens.

Front

Practicing doubles with your child.

Back

Ask questions like 'What is the double of 4?' or 'What is 3 + 3?'