✌️✖️

DOUBLING STRATEGY

Use doubling chains to multiply by 4, 8, and other even numbers in a flash.

L3L4

CS.N.2.6·Introducing multiplication as repeated addition(II)CS.N.3.4·Performing multiplication and division with natural numbers(III)

Section 1 / 3

MULTIPLY BY 2: JUST DOUBLE!

Multiplying by 2 is the same as doubling. To multiply by 4, double twice. To multiply by 8, double three times. Doubling chains give you three times tables for the price of one!

4 x 7

1Double 7 = 14 (that is 2 x 7)

2Double again: 14 x 2 = 28

3So 4 x 7 = 28

= 28

LEADER TIP

Connect doubling to the x2, x4, and x8 tables. If students can double, they can multiply by any power of 2.

BEFORE THIS LESSON, TRY

📊Times Tables Mastery

PRACTICE WITH THESE GAMES

×2Double & Halve 🎯Multiplication Quiz ⚡Math Sprint

Want more practice? Generate printable worksheets with similar problems.

Go to Worksheets

DOUBLING STRATEGY

What would you like to share?