Mathematics
Measurement
Procedural
7–8 yrs
Addition and subtraction word problems
加减法应用题
Description
Solve word problems involving lengths within 100, using addition and subtraction with drawings and equations
Mastery Evidence
- Solve 'The rope is 45 cm long. I cut off 18 cm. How long is it now?'
- Draw a diagram (e.g. a ruler drawing) to represent a length word problem
- Write an equation with a symbol for the unknown to represent the problem
Assessment Prompt
If your child has a piece of rope 75 cm long and cuts off 28 cm, can they work out how much rope is left — and draw a number-line diagram to show it?
