1Question

# Estimate Products micro-lesson

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 2 numbers, sometimes you don't want an exact answer. You want an estimate. Let's say we have 92 marbles in each jar, and we have 6 jars, and we want to know approximately how many marbles we have altogether. So, we can round 92 to 90, 9 x 6 which is 54 and tack on our zero. So, our estimate is 540 marbles. Using an area model to multiply 92 x 6, we came out to 552 which is very close to our estimate of 540. So that's a reasonable answer. Let's try estimating 23 x 17. We can round 23 to 20 and 17 also to 20. Use your facts, 2 x 2 which is 4 and tack on two zeros. Multiply 23 x 17 and we come out with 391 which is very close to our estimate of 400. We've used compatible numbers; those are numbers easily multiplied in your head. Use compatible numbers when you want to estimate your products.

Kids earn more screen time by answering fun educational questions.

1) 270
2) 240
3) 27
4) 2700

1) 320
2) 280
3) 3200
4) 764

1) 400
2) 300
3) 500
4) 40

1) 270
2) 300
3) 290
4) 310

1) 3500
2) 350
3) 2800
4) 280

1) 600
2) 500
3) 700
4) 800

1) 540
2) 600
3) 450
4) 90

1) 800
2) 900
3) 700
4) 1000

1) 1000
2) 950
3) 400
4) 900

1) 1400
2) 1314
3) 1300
4) 1200

1) 2400
2) 1600
3) 24000
4) 160

1) 24000
2) 2400
3) 240
4) 32000

1) 5000
2) 4600
3) 6000
4) 4000

1) 64000
2) 6400
3) 56000
4) 1600

1) 6300
2) 7200
3) 5600
4) 7000

1) 2400
2) 24000
3) 240
4) 1500

1) 2 x 2
2) 2 x 10
3) 4 x 4
4) 2 x 40
• #### When you estimate 23 x 17, to what should you round each factor?

1) 23 to 20 and 17 to 20
2) 23 to 30 and 17 to 20
3) 23 to 20 and 17 to 10
4) 23 to 30 and 17 to 10
• #### What are two closest compatible numbers for the factors 46 and 97?

1) 50 and 100
2) 40 and 100
3) 50 and 90
4) 40 and 90
• #### What are compatible numbers?

1) Numbers close to your factors that you can easily multiply mentally.
2) All numbers that have a zero.
3) Numbers a little larger than your factors.
4) Numbers you have rounded down.

1) Yes
2) No

1) No
2) Yes

1) No
2) Yes

1) TRUE
2) FALSE

1) TRUE
2) FALSE

## 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.

Our micro-courses are developed and delivered by qualified educators from around the world.

#### Chris Lindsey

More lessons from the micro-course

##### Use Area Models to Multiply 2 x 2 Digits

Area models are a great way to solve multiplication problems. With larger numbers, you’re going…

##### Skip Counting to find multiples

Did you know that you can find multiples by using skip counting? If you skip…

##### Multiply Using Partial Products

When you multiply two digits by two digits, you might want to try the partial…

##### Multiply by Multiples of Ten

When you multiply with multiples of 10, remember, it’s all about the facts. For example,…

##### Multiplication Word Problems

When solving multiplication word problems, here’s a few strategies you can use. Sal earns \$12…

##### Prime and Composite Numbers

What’s the difference between prime and composite numbers? Here is a list of the first…

##### Find Area of a Rectangle

When we talk about the area of a rectangle, we’re talking about measuring the space…

##### Multi-Step Word Problems

Sometimes when you’re doing word problems, they require more than one step. Two classes of…

##### Multiply Area Models

If you want to multiply with 2- or 3-digit numbers, you should use area models….

##### Number Patterns

Sometimes numbers follow a pattern and we need to figure out what the rule is…

##### Factors

Factors are the numbers you multiply together to find a product. Every number has at…