NCERT Solutions for Class 4th Maths Chapter 7 The Cleanest Village
Updated on 2026-09-19
About this chapter
We work with money, people and pages using a number line, play money or place-value tokens. In column addition and subtraction we write H, T and O one below the other, and always start from the ones. When a column fills up to ten we regroup: 10 ones make 1 ten, 10 tens make 1 hundred, 10 hundreds make 1 thousand. When there are not enough ones to take away, we regroup 1 ten as 10 ones; when there are not enough tens, we regroup 1 hundred as 10 tens. Balance = Paid − Cost, so Cost + Balance always gives back the money paid. We estimate first by rounding, then check that the real answer is close to the estimate. Some sums are quicker without columns: 811 + 99 is 811 + 100 − 1, and 410 − 12 is 410 − 10 − 2.
- Daisy and Lou Go Shopping
- Help Udaya Didi find the missing numbers
- Four children and the orange seller
- The triangle puzzle
- Add Up
- Kalakshitij, column sums and Preeti’s school
- Subtract It
- Ram Chacha’s mangoes and Ranganna’s dolls
- Question 5
- Question 1
Exercises
- Daisy and Lou Go Shopping — In-text Questions Page 97
- Help Udaya Didi find the missing numbers — In-text Questions Page 98
- Four children and the orange seller — A Strange Puzzle! Page 99
- The triangle puzzle — Let Us Play Page 100
- Add Up — In-text Questions Page 101
- Add Up — In-text Questions Page 102
- Add Up — In-text Questions Page 103
- Add Up — In-text Questions Page 104
- Kalakshitij, column sums and Preeti’s school — Let Us Do Page 105
- Subtract It — In-text Questions Page 106
- Subtract It — In-text Questions Page 107
- Ram Chacha’s mangoes and Ranganna’s dolls — Let Us Solve Page 108
- Question 5 — Let Us Solve Page 109
- Question 1 — Let Us Solve Page 109 to 110
- Question 2 — Let Us Solve Page 110 to 111
- Column frames, quick ways and notebook practice — Let Us Solve Page 111
- Question e — Let Us Solve Page 112
- The grid of numbers — Number Pair Hunt Page 112 to 113
- Fill the missing digits — The Missing Digits Page 113
- Practice: add and subtract — Let Us Do Page 114