Using Dienes to multiply a 2 digit number by a 1 digit number
Using Dienes to multiply a 2 digit number by a 1 digit number
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Lesson details
Key learning points
- In this lesson, we will learn to multiply 2 digit numbers by 1 digit numbers using Dienes blocks. We will use visual representations to make multiplication processes clearer, and we will investigate when to regroup quantities when using Dienes blocks.
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This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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6 Questions
Q1.
Which is an example of partitioning?
10 divided by 2
6 x 3
Q2.
Partitioning makes multiplying two digit numbers easier.
False
Q3.
13 x 5 =
45
55
Q4.
17 x 3 =
121
24
Q5.
18 x 4 =
76
84
Q6.
Use what you know about place value to work out 180 x 4 =
760
840
5 Questions
Q1.
What is 22 x 4?
66
80
Q2.
What is the missing word? If there are ten or more ones, we must ______________ the ones into tens and ones.
partition
recombine
Q3.
Do you need to regroup ones into tens when calculating 11 x 7?
Yes
Q4.
Do you need to regroup tens when calculating 43 x 4?
No
Q5.
What do you need to regroup when calculating 45 x 5?
Ones
Tens