Mathematics Measurement Procedural 9–10 yrs

Estimating answers (age 9+)

估算答案（9岁以上）

Description

Apply the area formula (l × w) and perimeter formula (2l + 2w) for rectangles including squares in real-world and mathematical problems; calculate and compare areas using standard units (cm², m²) and estimate areas of irregular shapes

Mastery Evidence

✓ Find the width of a room given area = 48 m² and length = 8 m
✓ Calculate the area of a square with side 7.5 cm
✓ Estimate the area of an irregular pond drawn on a cm² grid

Assessment Prompt

If your child wants to carpet a room 6.5 m × 4 m, can they calculate the area — and also work out how many metres of skirting board are needed around the edge?