AMO Grade 4 · 6. Word problems with bar models
Draw a bar model first: sum–difference, sum–ratio, difference–ratio, fractions of a number, averages, charts, ages and giving problems from the official AMO Grade 4 papers.
Solve sum–difference problems with two or more quantities using a bar model.
Solve sum–ratio and difference–ratio problems by counting equal parts.
Find a fraction of a number, a number from its fraction, and a fraction of the remainder.
Use average × count = total and read bar charts and pie charts.
Solve age and giving problems by finding what stays the same.