NCERT Solutions for Class 4th Maths Chapter 4 Identify and write the numbers — Let Us Solve
Book page 50 Updated on2026-09-19
Q1. Identify and write the numbers for each of the following in your notebook. Draw pictures like these, if needed. — a) 45 Ones
Answer 45 Ones = 4 Tens + 5 Ones
Number = 45
45 drawn with blocks.Why it happens: we keep trading ten of one kind for one of the next kind, so that every box holds a digit from 0 to 9.
Q2. Identify and write the numbers for each of the following in your notebook. Draw pictures like these, if needed. — b) 39 Ones
Answer 39 Ones = 3 Tens + 9 Ones
Number = 39
39 drawn with blocks.Why it happens: we keep trading ten of one kind for one of the next kind, so that every box holds a digit from 0 to 9.
Q3. Identify and write the numbers for each of the following in your notebook. Draw pictures like these, if needed. — c) 35 Tens
Answer 35 Tens = 3 Hundreds + 5 Tens
Number = 350
350 drawn with blocks.Why it happens: we keep trading ten of one kind for one of the next kind, so that every box holds a digit from 0 to 9.
Q4. Identify and write the numbers for each of the following in your notebook. Draw pictures like these, if needed. — d) 86 Tens
Answer 86 Tens = 8 Hundreds + 6 Tens
Number = 860
860 drawn with blocks.Why it happens: we keep trading ten of one kind for one of the next kind, so that every box holds a digit from 0 to 9.
Q5. Identify and write the numbers for each of the following in your notebook. Draw pictures like these, if needed. — e) 10 Tens and 1 Ones
Answer 10 Tens = 1 Hundred, and 1 One is left
Number = 101
101 drawn with blocks.Why it happens: we keep trading ten of one kind for one of the next kind, so that every box holds a digit from 0 to 9.
Q6. Identify and write the numbers for each of the following in your notebook. Draw pictures like these, if needed. — f) 15 Tens and 23 Ones
Answer 15 Tens = 150; 23 Ones = 23; 150 + 23 = 173
Number = 173
173 drawn with blocks.Why it happens: we keep trading ten of one kind for one of the next kind, so that every box holds a digit from 0 to 9.
Q7. Identify and write the numbers for each of the following in your notebook. Draw pictures like these, if needed. — g) 34 Tens and 12 Ones
Answer 34 Tens = 340; 12 Ones = 12; 340 + 12 = 352
Number = 352
352 drawn with blocks.Why it happens: we keep trading ten of one kind for one of the next kind, so that every box holds a digit from 0 to 9.
Q8. Identify and write the numbers for each of the following in your notebook. Draw pictures like these, if needed. — h) 19 Tens and 10 Ones
Answer 19 Tens = 190; 10 Ones = 10; 190 + 10 = 200
Number = 200
200 drawn with blocks.Why it happens: we keep trading ten of one kind for one of the next kind, so that every box holds a digit from 0 to 9.
Q9. Identify and write the numbers for each of the following in your notebook. Draw pictures like these, if needed. — i) 2 Hundreds, 13 Tens and 7 Ones
Answer 200 + 130 + 7 = 337
Number = 337
337 drawn with blocks.Why it happens: we keep trading ten of one kind for one of the next kind, so that every box holds a digit from 0 to 9.
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