CBSE Class 5 Mathematics How Heavy How Light Worksheet Set 01

Question 1. The shapes below are made from centimeter cubes. Work out the volume of each one: Shape 1 (a single horizontal row of cubes).
Answer: Count the number of centimeter cubes in the given shape.
There are 4 flat cubes in a row plus a stack of 2 cubes at the right end, so 4 + 2 = 6 cubes.
Volume = 6 cm cubes
In simple words: Count each individual cube to find the total volume in cubic centimeters.
Exam Tip: For single-layer figures, counting the visible cubes directly gives the total volume.

Question 2. The shapes below are made from centimeter cubes. Work out the volume of each one: Shape 2 (a longer horizontal bar of cubes).
Answer: Count the number of centimeter cubes in the given shape.
There are 6 cubes in the long row and 1 cube stepped down at the right end, so 6 + 1 = 7 cubes.
Volume = 7 cm cubes
In simple words: Count all the cubes placed side by side to get the volume.

Exam Tip: Be careful not to skip or double-count cubes when they are arranged in a straight line.

Question 3. The shapes below are made from centimeter cubes. Work out the volume of each one: Shape 3 (a U-shaped figure of cubes).
Answer: Count the number of centimeter cubes in the U-shaped figure.
Top bar = 6 cubes
Left leg below the bar = 3 cubes
Right leg below the bar = 3 cubes
Total cubes = 6 + 3 + 3 = 12 cm cubes
Volume = 12 cm cubes
In simple words: Break the shape into parts (top bar, left leg, right leg) and add their cube counts together.

Exam Tip: For bent or C/U-shaped figures, dividing the shape into simpler sections helps prevent counting mistakes.

Question 4. The shapes below are made from centimeter cubes. Work out the volume of each one: Shape 4 (a rectangular block of cubes).
Answer: Count the number of centimeter cubes in the rectangular block.
Bottom layer = 1 row of 4 cubes = 4 cubes
Upper block = 2 layers of 4 cubes = 8 cubes
Total cubes = 4 + 8 = 12 cm cubes
Volume = 12 cm cubes
In simple words: Count the cubes in each layer and add them together.

Exam Tip: For 3D block structures, find the volume of one layer first and then multiply by the total number of layers.

Question 5. The shapes below are made from centimeter cubes. Work out the volume of each one: Shape 5 (a stepped or irregular arrangement of cubes).
Answer: Count the number of centimeter cubes in the stepped arrangement.
The long bottom row has 8 cubes.
The raised cubes on top: 1 + 1 + 1 + 1 + 2 = 6 cubes (the highest columns have 2 cubes on top in places).
Total cubes = 8 + 6 = 14 cm cubes
Volume = 14 cm cubes
In simple words: Count the cubes level by level from bottom to top and sum them up.