Multiply by Multiples of Ten microlesson
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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.
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How many zeroes will the product of 4 x 300 have?
1) 22) 13) 34) 4 
How many zeroes will the product of 70 x 30 have?
1) 22) 13) 34) 4 
If you multiply 20 x 5, how many total zeroes will your product have?
1) 22) 13) 34) 0 
How many total zeroes will the product of 40 x 200 have?
1) 32) 23) 44) 5 
How many total zeroes will the product of 80 x 50 have?
1) 32) 23) 44) 1 
How many total zeroes will the product of 50 x 600 have?
1) 42) 33) 24) 5 
Gia's case holds 12 jars. How many jars will 10 cases hold?
1) 1202) 123) 12004) 22 
Multiply 17 x 10.
1) 1702) 273) 174) 1700 
What factor do you multiply by 70 to equal 210?
1) 32) 303) 3004) 3000 
What factor do you multiply by 2 to equal 800?
1) 4002) 403) 44) 16 
Multiply 80 x 30.
1) 24002) 2403) 1104) 24000 
What is 4 x 3,000?
1) 120002) 12003) 110004) 43000 
What is 4 x 4,000?
1) 160002) 16003) 440004) 12000 
Multiply 3 x 9,000.
1) 270002) 27003) 240004) 29000 
Complete the pattern: 6 x 3 + 18 6 x 30 = 180 6 x 300 = __
1) 18002) 180003) 1804) 18 
What is 3 x 7000?
1) 210002) 200003) 190004) 22000 
What is 900 x 70?
1) 630002) 620003) 63004) 67000 
What is 300 x 30?
1) 90002) 900003) 9004) 90 
What is the multiplication fact that helps you find 4 x 30?
1) 4 x 32) 4 x 103) 3 x 404) 10 x 3 
What is 9 x 50?
1) 4502) 4, 5003) 9504) 400 
Sally's ribbon is 30 inches. Lisa has a ribbon 5 times that long. How long is Lisa's ribbon?
1) 150 inches2) 50 inches3) 15 inches4) 35 inches 
Which fact can help you solve 70 x 30?
1) 7 x 32) 7 x 103) 3 x 104) 7 x 0 
Which fact can best help you solve 70 x 80?
1) 7 x 82) 7 x 103) 8 x 104) 10 x 80 
If you multiply 7 x 60, is the product greater than or less than 400?
1) greater than2) less than 
Is the product of 200 x 50 equal to 1,000?
1) No2) Yes
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