# Number Sense Blog

### Mathnasium #MathTricks: Percents (Commutative Property)

Jan 19, 2022

Welcome to Mathnasium’s Math Tricks! Here’s a trick to calculate percentages using the commutative property of multiplication. Let’s do this! 👍
To find 48% of 50 means to multiply 48 x x 50.
We can use the commutative property of multi...

### To Succeed in the Global Economy, Children Need Stronger Math Skills

Jan 12, 2022

Our children’s long-term success depends on their ability to compete and collaborate with people around the world. There is one language they will all need to use, and it’s not English or French: It’s math. Unfortunately, Canadian students’ m...

### Mathnasium #MathTricks: Divisibility (Rule for 9s)

Jan 5, 2022

A number is divisible by 9 if the sum of the digits is divisible by 9.
To determine if the number 738 is divisible by 9, we find the sum of its digits. Seven plus three plus eight gives us a final sum of eighteen. Eighteen is divisible by ...

### Mathnasium #MathTricks: Half of Even Numbers (Part 2)

Dec 15, 2021

To find half of even numbers, sometimes it is useful to break apart the whole number into its parts. We can do this to find half of 26.
Since 26 is composed of 2 tens and 6 ones, we can find half of 26 by finding half of 20 and half of 6. Half ...

### Mathnasium #MathTricks: Number Sense (Subtraction Part 2)

Dec 8, 2021

Here is a number sense trick to subtract without borrowing.
Let’s say we want to subtract 54 from 900. Since the digits in the ones and tens places of 900 are both less than the same digits in 54, we need to borrow to find the difference.
Wi...