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# Multiply by Multiples of Ten micro-lesson

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## Learning time​

Kids learn by watching short, engaging video lessons.

When you multiply with multiples of 10, remember, it's all about the facts. For example, if you take 4 x 30, you can use the fact 4 x 3 which is 12 and then tack on one zero for 120. You can also do it with multiples of 100. 4 x 300 is the same fact, 12. This time you tack on two zeros, 1, 2, 1,200 or 1,200. And you can even do it with multiples of 1,000. Same facts, 4 x 3. Only this time, you tack on three zeros, 12,000. Let's try another one, 70 x 30. Remember, it's all about the facts. 7 x 3 is 21 and you have a zero from the 70 and a zero from the 30. So, I tack on two zeros and my answer is 2,100. So, remember, whenever you want to multiply with multiples of 10, 100, or 1,000 it's all about the facts.

Kids earn more screen time by answering fun educational questions.

1) 2
2) 1
3) 3
4) 4

1) 2
2) 1
3) 3
4) 4

1) 2
2) 1
3) 3
4) 0

1) 3
2) 2
3) 4
4) 5

1) 3
2) 2
3) 4
4) 1

1) 4
2) 3
3) 2
4) 5

1) 120
2) 12
3) 1200
4) 22

1) 170
2) 27
3) 17
4) 1700

1) 3
2) 30
3) 300
4) 3000

1) 400
2) 40
3) 4
4) 16

1) 2400
2) 240
3) 110
4) 24000

1) 12000
2) 1200
3) 11000
4) 43000

1) 16000
2) 1600
3) 44000
4) 12000

1) 27000
2) 2700
3) 24000
4) 29000

1) 1800
2) 18000
3) 180
4) 18

1) 21000
2) 20000
3) 19000
4) 22000

1) 63000
2) 62000
3) 6300
4) 67000

1) 9000
2) 90000
3) 900
4) 90

1) 4 x 3
2) 4 x 10
3) 3 x 40
4) 10 x 3

1) 450
2) 4, 500
3) 950
4) 400
• #### Sally's ribbon is 30 inches. Lisa has a ribbon 5 times that long. How long is Lisa's ribbon?

1) 150 inches
2) 50 inches
3) 15 inches
4) 35 inches

1) 7 x 3
2) 7 x 10
3) 3 x 10
4) 7 x 0

1) 7 x 8
2) 7 x 10
3) 8 x 10
4) 10 x 80
• #### If you multiply 7 x 60, is the product greater than or less than 400?

1) greater than
2) less than

1) No
2) Yes

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#### Chris Lindsey

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