Maths trick
Bar models
Draw the problem as bars so you can see what to work out.
Ages 7–13
Worked example
Tap through the steps. Each step can be read aloud.
Step 1 of 4
There are 48 pencils. There are 3 times as many red pencils as blue ones. How many are blue?
Quick practice
Five fresh questions, marked straight away. Use the trick!
Draw the problem as bars so you can see what to work out.
More tricks
Column addition
Line up the digits by place value, add from the ones, and carry when a column makes 10 or more.
Column subtraction
Subtract from the ones; when the top digit is too small, exchange 1 from the next column.