Step-by-step Maths Level 4 · Solving problems with the four operations · Summary
Step-by-step Maths Level 4 Solving problems with the four operations: summary and key words
Part of the Step-by-step Maths Level 4 solving problems with the four operations chapter. Chapter overview · whole chapter on one page
Chapter summary
| Skill | Method |
|---|---|
| Choosing one operation | Key words: altogether = add; left = subtract; equal groups = multiply; shared = divide |
| Two-step problems | Do the first step, write the answer, then use it in the second step |
| Missing numbers | Work backwards: undo each step in reverse, with the opposite operation |
| Fractions of amounts | Divide by the bottom number, multiply by the top; take away if asked what is left |
| Explaining the choice | Name the operation and give a reason that uses the story |
Can you…?
- I can choose the operation for a one-step problem with numbers to 10000
- I can solve a two-step problem, one step at a time
- I can work backwards to find a missing number
- I can find a fraction of an amount in a problem
- I can name an operation and explain why it fits a problem
Key terms
- operation
- a way of combining numbers: add, subtract, multiply or divide
- two-step problem
- a problem that needs two operations, done in order
- work backwards
- undo each step, in the reverse order, to find the start
- key words
- words in a problem that tell you the operation, such as altogether or left