DOUBLE & HALF SHORTCUTS

Double and halve numbers instantly, and use the trick to multiply by 5.

L3L4

CS.N.2.6·Introducing multiplication as repeated addition(II)CS.N.2.7·Introducing division as equal sharing(II)

Section 1 / 3

INSTANT DOUBLING

To double any number, split it into tens and ones and double each part. Double 35: double 30 = 60, double 5 = 10, answer = 70. Fast and reliable for any size number!

Double 35

1Double 30 = 60

2Double 5 = 10

360 + 10 = 70

= 70

LEADER TIP

Connect to real life: half a pizza, double a recipe. Practical contexts make the skill stick.

BEFORE THIS LESSON, TRY

Bridging Through Ten

PRACTICE WITH THESE GAMES

Double & Halve

Math Sprint

Quick Calculate

Want more practice? Generate printable worksheets with similar problems.

Go to Worksheets

CONTINUE WITH:

Multiply by 5, 25 & 50

DOUBLE & HALF SHORTCUTS

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DOUBLE & HALF SHORTCUTS