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Skills Covered

  • Count the unit cubes in a figure, hidden ones included
  • Count a box shape layer by layer
  • Multiply the cubes in one layer by the number of layers
  • Match a figure to its building plan
  • Find how many cubes fill a box, or half of it
  • Solve word problems about filling boxes with cubes

How to Use This Pack

Five pages about building with unit cubes and counting them. Page 1 states the rule for every picture (no cubes are hidden except the ones holding others up), works one figure layer by layer, and asks for the cubes in eight more figures of 4 to 14 cubes. Page 2 shows six box shapes; students fill in a table with the cubes in one layer, the number of layers, and the cubes in all. Page 3 matches four figures to five building plans, where each square of a plan shows how many cubes stand on it, and asks for each total. Page 4 has four clear boxes with a row of cubes along two bottom edges and a stack in the corner: students find the cubes in one layer, the layers, the cubes that fill the box, and the cubes that fill half of it. Page 5 compares figures, finds how many more cubes make a box shape, and has four word problems.

In the Classroom

Hand out connecting cubes before page 1 and build the worked example together: four on the bottom and one on top, with one cube hidden underneath. On page 3, let students build each figure on a paper plan, then turn the plan so its front faces them and compare it with the picture. Before page 4, fill a small box with cubes one layer at a time and count the layers out loud.

At Home

Stack sugar cubes, dice, or blocks into a small box shape and count them two ways: one at a time, and as layers. Ask how many would fill a shoebox if one layer holds 12 blocks and it holds 3 layers.

Tips for Success

  • Count one layer at a time, from the bottom up
  • A cube that holds another cube up is there even if you cannot see it
  • In a box shape every layer has the same number of cubes, so multiply
  • The front of a building plan is its bottom row; turn the plan to face the picture
  • Half of a box is half of the cubes that fill it

Counting Cubes

3rd Grade

A 5-page unit cubes pack for 3rd grade. Count the cubes in figures built on a mat, find the cubes in one layer and the number of layers of box shapes, and match figures to building plans that show how many cubes stand on each square. Then work out how many cubes fill a clear box and half of it, compare figures, find how many more cubes make a box shape, and solve word problems about boxes of cubes. Every page comes in color and in black and white. Answer keys included.

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What’s Included

  • 5 worksheets in color and in black and white, with answer keys (15 pages)
  • Figures of 4 to 14 cubes to count, with the hidden-cube rule and a worked example
  • Box shapes to count by layers, and figures to match to their building plans
  • Clear boxes to fill, comparisons, how many more cubes, and word problems
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