Multiply by Multiples of Ten microlesson
Do you struggle with balancing your kids’ screen time with their education? Say hello to 1Question, the app that solves this problem with a fun twist! Our app lets your child earn screen time minutes in their favourite apps by watching educational videos and correctly answering quiz questions. And the best part? You get to decide which apps to lock behind learning using 1Question.
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.
Answer time
Kids earn more screen time by answering fun educational questions.
Here are some example of questions about this video that kids may be asked in the 1Question app to earn screen time.

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
Recreational screen time
Kids can use the screen time minutes they earned to unlock the apps selected by their parent e.g. games, social media, streaming, etc.
Out of time
When screen time minutes run out, kids are locked out and need to complete more learning in 1Question to earn more time.
Meet your educator
Our microcourses are developed and delivered by qualified educators from around the world.
Chris Lindsey
More lessons from the Master Multiplication microcourse
Area models are a great way to solve multiplication problems. With larger numbers, you’re going…
Did you know that you can find multiples by using skip counting? If you skip…
When you multiply two digits by two digits, you might want to try the partial…
When solving multiplication word problems, here’s a few strategies you can use. Sal earns $12…
What’s the difference between prime and composite numbers? Here is a list of the first…
When we talk about the area of a rectangle, we’re talking about measuring the space…
Sometimes when you’re doing word problems, they require more than one step. Two classes of…
If you want to multiply with 2 or 3digit numbers, you should use area models….
When you multiply 2 numbers, sometimes you don’t want an exact answer. You want an…
Sometimes numbers follow a pattern and we need to figure out what the rule is…
Factors are the numbers you multiply together to find a product. Every number has at…