Question P5–P6 Units and parts
Today’s problem — free all day, every step. Every day has one.
John's salary is $3,200. He spends 40% on rent, 25% on food, and saves the rest. How much does he save each month?
See all 6 steps
MathBrush is being tested with a few parent groups, and every solution on the site is open to them — one household, all children. If you were given a code, it goes in once and this device remembers it.
I have a code → See a free one like it
65 worked examples are free without a code, two from every pattern. No account, either way.
Cut one amount into equal shares. One number tells you what a share is worth.
In this one. Add the two spending percentages before doing any money arithmetic — then "the rest" is a single subtraction from 100%, instead of two separate amounts to work out and take away.
A single amount is split by a ratio, a fraction or a percentage. One extra number gives you the leftover, the difference, or the value of one share.
Children match the given number to the wrong number of shares, using the whole bar when the number covers only the leftover or the difference between two people's shares.
Worked examples of all 33 patterns and skills, in a booklet you can print.