NCERT Solutions for Class 4th Maths Chapter 7 Add Up — In-text Questions
Book page 104 Updated on2026-09-19
Q1.
Estimate the money they took for the trip. ________
Answer
About ₹300.
₹185 → about ₹200 ₹125 → about ₹100 ₹200 + ₹100 = about ₹300
Why it happens: 185 is nearer to 200 than to 100, and 125 is nearer to 100 than to 200.
Tip: An estimate is not the exact answer. It only tells us roughly what to expect, so a silly mistake is easy to spot.
Q2.
Daisy and Lou had collected ₹185 in their piggy bank. Their mother gave them ₹125 more for the trip. How much money did they take for the trip? 185 + 125 = ____ H + ____ T + ____ O = ____ H + ____ T + ____ O. Daisy and Lou took ₹______ for the trip.
Answer
The empty H, T and O boxes printed beside the sum on page 104.
They took ₹310 for the trip.
The working, written in columns.
1 H + 8 T + 5 O 1 H + 2 T + 5 O = 2 H + 10 T + 10 O 10 O = 1 T, so the tens become 11 T 10 T = 1 H, so 11 T = 1 H + 1 T = 3 H + 1 T + 0 O = 310
So the two blank lines are 2 H + 10 T + 10 O and 3 H + 1 T + 0 O, and they took ₹310.
The same boxes, filled in.
Why it happens: Regrouping happens twice here — first ten ones become a ten, and then ten tens become a hundred.
Check it yourself: Our estimate was about ₹300, and ₹310 is close to it.