Each square is 1 unit. A bar from 0 to 6 is 6 units long. If it starts at 3 and ends at 8, count the squares: 8 − 3 = 5 units.
Worked example
Each square is 1 unit. How many units long is the bar?
Answer:6 units
The bar starts at the 0 and ends at the 6. It covers 6 squares end to end, so it is 6 units long. Answer: 6 units.
For grown-ups: Measure with same-size non-standard units, no gaps or overlaps. Below: three problems to try with the worked answers, and a free printable sheet. Children can practise the same skill as a game, with no sign-up and no ads.
CCSS 1.MD.A.2
What this practises, for teachers
Practices measure with same-size non-standard units, no gaps or overlaps (1.MD.A.2). A printable sheet with its answer key, worked answers on the page, no accounts.