Today’s problem — free all day, every step. Every day has one.
Ahmad spent $36 on books. This was of his savings. After buying the books, he spent of the remaining savings on a game. How much did he spend on the game?
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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.
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65 worked examples are free without a code, two from every pattern. No account, either way.
The second fraction is of one piece, not of the whole.
In this one. A given amount lands on a whole number of units — $36 is 4 units, so it fixes 1 unit = $9, and every later quantity is counted in those same units instead of guessed at as a fraction.
Also uses: Units and parts
A second fraction arrives after the first and is attached to a piece rather than to the whole — 'of the remainder', 'of what was left', or 'of the ones that were red'.
Children take the second fraction of the original total instead of the piece it was named against, which makes the amount come out too big.
Worked examples of all 33 patterns and skills, in a booklet you can print.