Practice and check
Worked example
Start at zero, follow the object endpoint to the ruler, and count the intervals with the unit.
4 − 0 = 4 cm
Check answers after trying
1: 4 cm; 2: 12 cm; 3: 18 cm; 4: 7 cm; 5: 15 cm; 6: 9 cm; 7: 3 cm; 8: 17 cm
0–20 cm
Tips for Parents
▸ Practice and check This ruler extends to 20 cm, with numbers printed every 2 cm and a main tick at each whole centimeter. Read 12 cm at its label; for 17 cm, start at 16 and move one centimeter farther. This page widens the number range. It does not introduce half-centimeter answers. For a longer object, starting from a nearby labeled number can be easier than recounting from zero. ▸ Worked example 4 − 0 = 4 cm ▸ Check answers after trying 0–20 cm ▸ Next worksheet Reading Length. Shared practice guide.
What This Worksheet Builds
On this worksheet, use this scale: This ruler extends to 20 cm, with numbers printed every 2 cm and a main tick at each whole centimeter. Read 12 cm at its label; for 17 cm, start at 16 and move one centimeter farther
Next Step
Next worksheet: Reading Length. Shared practice guide.