Chapter 3

Problem Solving

Solve everyday money word problems with 4 steps: understand, plan, solve, check.

Four steps for money word problems

Word problems tell a short story about money, like shopping, sharing a bill or saving up. The numbers are hidden in the words, so we read carefully and use these four steps every time:

Key idea

1) Understand — what is given and what to find.
2) Plan — choose + − × ÷.
3) Solve — do the working.
4) Check — is the answer sensible?

A worked word problem

Mother has RM50. She buys fish for RM18 and rice for RM12. How much change does she get?

Worked example

Understand: has RM50, spends on fish and rice, find the change.
Plan: add the costs, then subtract from RM50.
Solve: RM18 + RM12 = RM30, then RM50 − RM30 = RM20.
Check: RM30 + RM20 = RM50. Correct!

Remember

  • Share equally means divide.
  • 'Change' means subtract the cost from the money paid.
  • 'How much for each' or 'per item' often means divide.
  • Always check your answer at the end to be sure it is sensible.

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