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NCERT Solutions for Class 4th Maths Chapter 8 Erasers of 10 g — Let Us Do

Book page 119 Updated on2026-09-19

Q1.
How many erasers will weigh the same as a 50 g Haldi packet?
10 g10 g10 g10 g10 g10 g10 g10 g10 g10 g
The ten erasers printed at the top of page 119.
Answer
10 g10 g10 g10 g10 g10 g10 g10 g10 g10 g
The ten erasers printed at the top of page 119.

Each eraser in the picture weighs 10 g.

Count in tens till we reach 50:
10 g, 20 g, 30 g, 40 g, 50 g
That is 1, 2, 3, 4, 5 erasers

5 erasers weigh the same as a 50 g Haldi packet.

Why it happens: Five tens make fifty. So five erasers of 10 g each make 50 g.
Q2.
A 100 g soap bar will weigh the same as ________ erasers.
10 g10 g10 g10 g10 g10 g10 g10 g10 g10 g
The ten erasers printed at the top of page 119.
Answer
10 g10 g10 g10 g10 g10 g10 g10 g10 g10 g
The ten erasers printed at the top of page 119.

Each eraser in the picture weighs 10 g.

Skip-count by 10 up to 100:
10, 20, 30, 40, 50, 60, 70, 80, 90, 100
That is 10 erasers

A 100 g soap bar weighs the same as 10 erasers.

Why it happens: Ten tens make one hundred. The picture in the book shows exactly 10 erasers, and together they make 100 g.
Q3.
________ erasers will weigh the same as 250 g sugar.
10 g10 g10 g10 g10 g10 g10 g10 g10 g10 g
The ten erasers printed at the top of page 119.
Answer
10 g10 g10 g10 g10 g10 g10 g10 g10 g10 g
The ten erasers printed at the top of page 119.

Each eraser in the picture weighs 10 g.

10 erasers = 100 g
20 erasers = 200 g
5 more erasers = 50 g
200 g + 50 g = 250 g
20 + 5 = 25 erasers

25 erasers will weigh the same as 250 g sugar.

Why it happens: Every eraser adds 10 g. To reach 250 g we need as many tens as there are in 250, and 250 has 25 tens.
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