Number (mult/div)
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CanadaON
Grade 5

Multiply 2 two digit numbers

Lesson

We've already seen how to multiply a one digit number with another one digit number. So what do we do when it's a two digit number multiplied with another $2$2 digit number?

When we multiply we are always talking about groups. $13\times24$13×24 is actually saying $13$13 groups of $24$24 or $24$24groups of $13$13. We could add up all these groups, but that is a lot of addition to do in our head! There is actually an easier way. Watch this video to see how.

Worked Examples

Question 1

Question 2

Evaluate $49\times10$49×10

Question 3

Find $11\times32$11×32.

 

 

Outcomes

5.NN3.03

Multiply two-digit whole numbers by two-digit whole numbers, using estimation, student-generated algorithms, and standard algorithms

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