Zero Rules 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.
There are a few rules with the number 0 that you need to know with multiplication. The first rule is that whenever you are multiplying something by 0, the answer is always 0. So, we're going to look at this equation. We have 2 x 0. So, in this problem, you would have 2 groups and then 0 items in each group. And if you're counting how many items there are altogether, there's 0. And this is the case when you're multiplying any number times 0. It's always going to be, the answer is always going to be 0. The other rule is that you can never have 0 in the first number or the first factor in a multiplication equation. This is because if you have 0 groups, you don't have anywhere to put the items that the second number in the multiplication equation is saying. So those are the rules with zero.
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.

What number are the rules in this video about?
1) 02) 13) 24) 10 
What is the answer to the following multiplication equation 11 x 0 = ?
1) 02) 33) 114) 10 
What is the answer to the following multiplication equation 7 x 0 = ?
1) 02) 73) 704) 3 
What example equation is used in the video to show that you cannot have 0 as the first number/factor in a multiplication equation?
1) 0 x 5 =2) 0 x 1 =3) 0 x 10 =4) 0 x 8 = 
Which multiplication is used to show the first rule with zero?
1) 2 x 0 = 02) 6 x 0 = 03) 4 x 0 = 04) 1 x 0 = 0 
Any number multiplied by 0 is always 0.
1) Yes2) No 
Can you solve the following multiplication equation 12 x 0 = ?
1) Yes2) No 
You can have 0 as the first number in a multiplication equation.
1) No2) Yes 
Can you solve the following multiplication equation 0 x 9 = ?
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.
Kristin Tracy
More lessons from the Multiplication Basics and Rules microcourse
When you are solving multiplication problems with the number one, there is a simple rule…
There are some terms that you need to learn to help you understand multiplication. So,…