Measuring with same-size units

Mathematics · Measurement · ages 6-7

Name ______________________ Date ____________

What does the length number tell?
- how heavy it is
- what colour it is
- how old it is
- how many units span the object
The number you get when you measure with units tells you how many units span the object.
Circle one: True False
Which line up is correct?
- end to end, no gaps, no overlaps
- with big gaps
- piled on top
- slanted and spaced
A shelf is 4 clips plus 3 clips long in two parts. How many clips total?
Answer: ______________
The shelf was measured in two stretches: first 6 blocks, then 5 more, end to end with no gaps. Type the total number of blocks long the shelf is.
Answer: ______________
Leo's paper clips overlapped each other while he measured his book. Will his count be too big, too small, or just right?
- Too small
- Just right
- Too big
Mia left gaps between her blocks while measuring her desk. Will her count be too big, too small, or just right?
- Too small
- Too big
- Just right
Why use same size clips?
- so desk is tidy
- so counts can compare
- so colours match
- so clips look nice
Ben measures a shelf with big blocks and counts 4. Ana measures the same shelf with small blocks and counts 9. Did one of them make a mistake?
- Yes, one of them counted wrong
- No, different-size units give different counts for the same length
- Yes, the shelf changed size
Priya says her count of 5 blocks is still correct even though some of her blocks overlap and others leave gaps. Is she right?
- Yes, it does not matter as long as she counts 5
- No, only gaps matter, overlaps are fine
- No, both gaps and overlaps make the count wrong

Answer key

For grown-ups. Fold this page away before handing over the rest.

Measuring with same-size units W1-mt_cqSf213hSa-s1

how many units span the object · Length counts units that cover it.
True · That number is the length, measured in those units.
end to end, no gaps, no overlaps · Units must touch with no overlap.
7 · 4 plus 3 is 7.
11 · Keep counting across both stretches: 6 blocks, then 5 more makes 11.
Too big · Overlapping clips cover the same space twice, so Leo needs more clips than the book really needs. The count comes out too big.
Too small · Gaps leave part of the desk uncovered, so fewer blocks get counted than the desk really needs. The count comes out too small.
so counts can compare · Same units keep counts fair.
No, different-size units give different counts for the same length · Bigger units span more length each, so fewer of them are needed to cover the same shelf. Both counts can be right.
No, both gaps and overlaps make the count wrong · Overlaps make the count read too high, and gaps make it read too low. Both throw off the true length.