Multi-Digit Multiplication

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Factoid

The heart rates of animals vary greatly. A bat’s heart beats about 750 times in a minute. However, a large whale’s heart beats only about 22 times in a minute.

​Multiply 750 x 22

​Strategies

1. Standard Algorithm

2. Area Model

3. Partial Product

Some text here about the topic of discussion

​Standard Algorithm

​1

750

x 22

​ 1500

​1500

16500

​Partial Product

​

750

x 22​

2 x 0 = 0

2 x 50 = 100

2 x 700 = 1400

20 x 0 = 0

20 x 50 = 1000

20 x 700 = 14000​

​Area Model

​

700 50 0​

​ 20

2

​

​14000	​1000	​0
​1400	​100	​0

​236 x 46

​1951 x 17

​3616 x 18

​345 x 98

​Two-digit

​519 x 4

2823 x ​3

1445 x 5

2204 x 6​

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​One-digit

​Practice Problems

Use the strategy that works for you!!!!!​