Mathematics
Measurement
Procedural
8–9 yrs
Understanding angles (age 8+)
认识角（8岁以上）
Description
Multiply side lengths to find areas of rectangles and represent whole-number products as rectangular areas
Mastery Evidence
- Calculate the area of a 7 cm × 9 cm rectangle as 63 cm²
- Draw a rectangle with area 36 square units and label its side lengths
- Solve: A garden is 8 m by 5 m — what is its area?
Assessment Prompt
If your child needs to carpet a room that is 5 m by 4 m, can they work out how much carpet to buy — using multiplication rather than counting squares?
