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Pre-K · Maths · Lessons
How many blocks tall?
🧱blocks🥫can🥤cup🔢count
How tall?
The big ideaSame-size blocks, one on the next, as tall as the thing. Count them.

How it works

Stack same-size blocks one on the next, as tall as the thing. Then count them.

The blocks must all be the same size.

Start at the bottom and go up with no gaps.

4 × 1 = 4
4 blocks as tall as the can.

Example 1: Measure a can

  1. Stack blocks beside a can until they are as tall.
  2. Count them: 1, 2, 3, 4.
  3. The can is 4 blocks tall.

Example 2: A fair way

  1. All the blocks are the same size.
  2. That makes it a fair measure.
  3. Different sizes would not be fair.

Example 3: Try it

  1. Measure a cup with the same blocks.
  2. Stack and count.
  3. Say how many blocks tall.

Words to know

tall
How far up something goes.
block
A small cube used to measure.

Watch out

Try it

  1. A cup is 3 blocks tall. How many blocks is that?
  2. Should the blocks be the same size?
  3. Can there be gaps between blocks?
  4. Where do you start to stack?
Answers: 1. 3 · 2. yes · 3. no · 4. at the bottom
For grown-upsMeasure toys with the same building bricks and say how many bricks tall each is.
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