NCERT Solutions for Class 4th Maths Chapter 4 Circle groups of ten 1s, 10s and 100s — In-text Questions

Book page 49 Updated on2026-09-19

Q1.
Circle groups of ten 1s, 10s, and 100s as many times as required in each of the following pictures. Fill in the empty boxes. — b) 23 Ones. ____ Tens + ____ Ones = ______
The 23 single blocks printed in part (b).
TensOnes
??
?
Answer
The 23 single blocks printed in part (b).

Ring the blocks in tens. Two rings can be made and 3 blocks are left.

Two groups of ten are circled; 3 blocks are left.
2 Tens + 3 Ones = 23
TensOnes
23

The number is 23.

Why it happens: the Tens box holds the number of full rings and the Ones box holds whatever is left over.
Q2.
Circle groups of ten 1s, 10s, and 100s as many times as required in each of the following pictures. Fill in the empty boxes. — c) 1 Ten and 27 Ones. ____ Tens + ____ Ones = _____
Part (c): one rod of ten and 27 single blocks.
TensOnes
??
?
Answer
Part (c): one rod of ten and 27 single blocks.

Ring the 27 loose blocks in tens. Two more rings can be made and 7 blocks are left.

27 Ones = 2 Tens + 7 Ones
1 Ten + 2 Tens = 3 Tens
30 + 7 = 37
After regrouping: 3 rods of ten and 7 single blocks.
3 Tens + 7 Ones = 37
TensOnes
37
Why it happens: once more than 9 ones pile up we must trade ten of them for a rod, or the Ones box will not hold them.
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