Estimation - JSS1 Mathematics Past Questions and Answers - page 2
11
Estimate the total number of chairs in a classroom with 5 rows and approximately 10 chairs per row.
Estimate = 5 rows × 10 chairs/row = 50 chairs
12
Estimate the average height of 5 classmates whose heights are measured as 140 cm, 150 cm, 135 cm, 155 cm, and 145 cm.
Average height ≈ (140 + 150 + 135 + 155 + 145) / 5 = 145 cm
13
Estimate the total length of a hallway by measuring and counting 30 of your steps, each step approximately 1 meter.
Total length ≈ 30 meters
14
Estimate the total weight of 4 boxes, each weighing approximately 2.5 kg.
Total weight ≈ 4 boxes × 2.5 kg/box = 10 kg