NCERT Solutions for Class 4th Maths Chapter 7 Subtract It — In-text Questions
Book page 106 Updated on2026-09-19
Q1.
Estimate the difference ____
Answer
About 30 children.
83 → about 80 46 → about 50 80 − 50 = about 30
Why it happens: Taking 5 tens from 8 tens leaves 3 tens, and that is easy to do in the head.
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.
83 children bought Pusaw. 46 children bought fruit plates. How many more children bought Pusaw?
Answer
37 more children bought pusaw than fruit plates.
Difference = 83 − 46
The working, written in columns.
8 T + 3 O 3 ones are not enough to take 6 ones away. Regroup 1 T = 10 O Now 7 T + 13 O 13 − 6 = 7 ones, 7 − 4 = 3 tens = 3 T + 7 O = 37
Why it happens: We open up one bundle of ten so that the ones place has enough to take from.
Check it yourself: 46 + 37 = 83.
Q3.
Estimate the number of children who are waiting. ________
Answer
About 220 children.
438 → about 440 215 → about 220 440 − 220 = about 220
Why it happens: Rounding to the nearest ten keeps the estimate close, because the two numbers hardly moved.
Tip: An estimate is not the exact answer. It only tells us roughly what to expect, so a silly mistake is easy to spot.
Q4.
All 438 decide to visit the famous Living Roots Bridge in Mawlynnong village. First, 215 children go to see the Living Roots Bridge. How many children are waiting to visit the Living Roots Bridge?
Answer
223 children are waiting.
Children waiting = 438 − 215
The working, written in columns.
8 − 5 = 3 ones 3 − 1 = 2 tens 4 − 2 = 2 hundreds = 2 H + 2 T + 3 O = 223
Why it happens: Every column has enough to take away from, so no regrouping is needed at all.
Check it yourself: 215 + 223 = 438, the whole group again.