Read scales with unlabelled marks
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. What length does the arrow point to on the measuring tape? Give your answer in cm.
2. What length does the arrow point to on the measuring tape? Give your answer in cm.
3. What length does the arrow point to on the measuring tape? Give your answer in cm.
4. What length does the arrow point to on the measuring tape? Give your answer in cm.
5. What length does the arrow point to on the measuring tape? Give your answer in cm.
Answer key · Read scales with unlabelled marks
1. 25
The labels go up by 10, and there are 2 spaces between two labels. Each small mark is worth 10 ÷ 2 = 5 cm.
The arrow is 1 mark past 20: 1 × 5 = 5.
20 + 5 = 25 cm.
2. 35
The labels go up by 10, and there are 2 spaces between two labels. Each small mark is worth 10 ÷ 2 = 5 cm.
The arrow is 1 mark past 30: 1 × 5 = 5.
30 + 5 = 35 cm.
3. 15
The labels go up by 10, and there are 2 spaces between two labels. Each small mark is worth 10 ÷ 2 = 5 cm.
The arrow is 1 mark past 10: 1 × 5 = 5.
10 + 5 = 15 cm.
4. 46
The labels go up by 10, and there are 5 spaces between two labels. Each small mark is worth 10 ÷ 5 = 2 cm.
The arrow is 3 marks past 40: 3 × 2 = 6.
40 + 6 = 46 cm.
5. 18
The labels go up by 10, and there are 5 spaces between two labels. Each small mark is worth 10 ÷ 5 = 2 cm.
The arrow is 4 marks past 10: 4 × 2 = 8.
10 + 8 = 18 cm.
Try it together
Choose three objects at home. Estimate their measurements, then check together and explain the differences.