6. Multiplication strategies

Lesson

Multiplication looks at equally sized groups. Doubling means multiplying equally sized groups by 2. Can you solve this problem?

Find 9\times2.

Worked Solution

Idea summary

Multiplying by two is the same as doubling and can be thought of as the total of two equally sized groups.

4 groups is twice (two times) as many as 2 groups. Let's look at how to multiply numbers by 4.

Find the product of 4\times 4.

Worked Solution

Idea summary

To solve questions with 4 times tables, you can use the Double, Double strategy. That means you double the number, then double the answer.