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NCERT Solutions for Class 4th Maths Chapter 4 Making 1000 — Let Us Break Up One-Thousand

Book page 47 Updated on2026-09-19

Q1.
a) We are at 900. How much more to make 1000? _________   900 + ____ = 1000
Answer
01002003004005006007008009001000900
The hundred-squares track from 0 to 1000, with 900 marked.

Count on in hundreds from 900: 1000

900 + 100 = 1000
Answer: 100
Why it happens: 1000 is ten hundreds. 900 is 9 hundreds, so the part still missing is 100.
Q2.
b) Mark 800. How much more to make 1000? _________   800 + ______ = 1000
Answer
01002003004005006007008009001000800
The hundred-squares track from 0 to 1000, with 800 marked.

Count on in hundreds from 800: 900, 1000

800 + 200 = 1000
Answer: 200
Why it happens: 1000 is ten hundreds. 800 is 8 hundreds, so the part still missing is 200.
Q3.
c) Mark 850. How much more to 1000? ________   850 + ____ = 1000
Answer
01002003004005006007008009001000850
The hundred-squares track from 0 to 1000, with 850 marked.

First go up to the next hundred: 850 + 50 = 900.
Then count on in hundreds to 1000.

850 + 150 = 1000
Answer: 150
Why it happens: 1000 is ten hundreds. 850 is 8 hundreds and 5 tens, so the part still missing is 150.
Q4.
d) Mark 760. How much more to 1000? ___________   760 + _____ = 1000
Answer
01002003004005006007008009001000760
The hundred-squares track from 0 to 1000, with 760 marked.

First go up to the next hundred: 760 + 40 = 800.
Then count on in hundreds to 1000.

760 + 240 = 1000
Answer: 240
Why it happens: 1000 is ten hundreds. 760 is 7 hundreds and 6 tens, so the part still missing is 240.
Q5.
e) Mark 400. How much less is 400 than 1000? ___________   1000 – ____ = 400
Answer
01002003004005006007008009001000400
The hundred-squares track from 0 to 1000, with 400 marked.

Count on in hundreds from 400 to 1000: 500, 600, 700, 800, 900, 1000 — that is 6 hundreds.

400 + 600 = 1000
So 1000 – 600 = 400
400 is 600 less than 1000.
Why it happens: 1000 is 10 hundreds and 400 is 4 hundreds. 10 hundreds – 4 hundreds = 6 hundreds = 600.
Q6.
f) Complete the addition facts leading to 1000. (The orange slice shows 670 + ___, 830 + ___, 497 + ___, 895 + ___, 775 + ___, 980 + ___, 500 + ___, and ___ + ___.)
Answer
Fact printed on the orangeMissing numberComplete fact
670 + ____330670 + 330 = 1000
830 + ____170830 + 170 = 1000
497 + ____503497 + 503 = 1000
895 + ____105895 + 105 = 1000
775 + ____225775 + 225 = 1000
980 + ____20980 + 20 = 1000
500 + ____500500 + 500 = 1000
____ + ____250 + 750250 + 750 = 1000

For each one, first go up to the next hundred, then count on to 1000.

497 → 500 is 3 more
500 → 1000 is 500 more
3 + 500 = 503
Why it happens: two numbers that add to 1000 are called a pair that makes a thousand. Their tens and ones together always make 100.
Tip: the last slice is empty, so any pair works. 250 + 750, 1 + 999 and 640 + 360 are all correct.
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