📘 Unit 3: Subtraction — Workbook Answers (Class 3 Maths)
Worksheet 1 (Page 24) — Subtraction of 1-digit number from 3-digit Numbers
1. Do the following subtractions.
a) 816 − 5 = 811
b) 856 − 6 = 850
c) 924 − 3 = 921
2. There are 116 students in a school. 5 students went for games meet. How many students are now in the school?
Total students in school = 116
Students who went for games meet = 5
Students now in school = 116 − 5 = 111 students
3. There are 629 toys in the store. 6 toys are sold. How many toys are left?
Total toys in store = 629
Toys sold = 6
Toys left in store = 629 − 6 = 623 toys
4. Do the subtractions (432 − 7) and (431 − 6) and compare which is greater?
432 − 7 = 425
431 − 6 = 425
Both results are equal (425).
5. Answer the following.
a) Out of 469 mangoes, 8 mangoes were eaten. How many mangoes remained?
Total mangoes = 469
Mangoes eaten = 8
Mangoes remaining = 469 − 8 = 461 mangoes
b) What is the 5th number before 125?
Numbers before 125: 124, 123, 122, 121, 120
5th number before 125 = 120
Worksheet 2 (Page 25) — Subtraction of 2-digit numbers from 3-digit Numbers
1. Do the following subtractions.
a) 168 − 12 = 156
b) 339 − 24 = 315
c) 592 − 21 = 571
d) 663 − 40 = 623
2. Answer the following questions.
a) After spending from ₹799, there were only ₹75 remained. How much amount was spent?
Total amount = ₹799
Amount remained = ₹75
Amount spent = 799 − 75 = ₹724
b) Calculate the differences, which two are equal? 43 − 18, 65 − 50, 37 − 12
43 − 18 = 25
65 − 50 = 15
37 − 12 = 25
43 − 18 and 37 − 12 are equal (both = 25)
c) A vendor had 376 milk packets in the morning. At closing time, 35 packets were left. How many packets were sold?
Number of milk packets in the morning = 376
Number of milk packets at closing time = 35
Number of milk packets sold = 376 − 35 = 341 packets
Worksheet 3 (Page 26) — Subtraction of 3-digit numbers from 3-digit Numbers
1. Do the following subtractions.
a) 188 − 107 = 081
b) 245 − 102 = 143
c) 379 − 214 = 165
d) 578 − 124 = 454
2. Answer the following questions.
a) There are 361 soldiers in a battalion. Only 250 soldiers have guns. How many guns are needed for the remaining soldiers?
Total soldiers = 361
Soldiers who have guns = 250
Guns needed = 361 − 250 = 111 guns
b) The cost of a photo is ₹380. If you have ₹270, how much more money is required?
Cost of photo = ₹380
Money available = ₹270
Money required = 380 − 270 = ₹110
c) There are 476 pupils in the school. Out of them 245 are boys. How many girls are there?
Number of pupils in school = 476
Number of boys = 245
Number of girls = 476 − 245 = 231 girls
Worksheet 4 (Page 27) — Subtraction of 3-digit numbers with regrouping
1. Do the following subtractions.
247 − 159 = 088
417 − 299 = 118
563 − 198 = 365
642 − 143 = 499
2. Chandini gave ₹398 for orphanage, Vyshanavi gave ₹359. Who gave more money and how much?
Amount given by Chandini = ₹398
Amount given by Vyshanavi = ₹359
Difference = 398 − 359 = ₹39 — Chandini gave ₹39 more.
3. Rama Rao wanted to make 300 toys. So far he has made only 186. How many more toys does he need to make?
Total toys needed = 300
Toys already made = 186
More toys to make = 300 − 186 = 114 toys
4. What is the difference between the 3-digit biggest number and the 3-digit smallest number?
3-digit biggest number = 999
3-digit smallest number = 100
Difference = 999 − 100 = 899
Worksheet 5 (Page 28) — Subtraction by Complementary Addition
1. Which number should be subtracted from 347 to get 291?
Given number = 347
Number to get = 291
Number to subtract = 347 − 291 = 56
2. By how much 315 is greater than 238?
Larger number = 315
Smaller number = 238
Difference = 315 − 238 = 77
3. A student scored 280 marks. He wishes to raise it to 400 marks. How many more marks should he get?
Marks needed = 400
Marks scored = 280
More marks needed = 400 − 280 = 120 marks
4. A teacher has to correct 145 worksheets. She corrected only 137. How many more sheets should she correct?
Total worksheets = 145
Worksheets corrected = 137
Worksheets remaining = 145 − 137 = 8 worksheets
5. Out of 907 books in a library, 765 have been distributed. How many books remain?
Total books in library = 907
Books distributed = 765
Books remaining = 907 − 765 = 142 books
Worksheet 6 (Page 29) — Word Problems on Subtraction
1. A bus traveled 936 km in a week. It traveled 487 km in the first four days. How many kilometers did it travel in the remaining days?
Total distance traveled in a week = 936 km
Distance traveled in first 4 days = 487 km
Distance traveled in remaining days = 936 − 487 = 449 km
2. Solve 534 − 287 and 534 − 286. Which difference is greater?
534 − 287 = 247
534 − 286 = 248
534 − 286 gives the greater difference (248)
3. Raju wants to save ₹909 for his birthday. He has already saved ₹389. How much more does he need to save?
Total amount needed = ₹909
Amount already saved = ₹389
Amount still needed = 909 − 389 = ₹520
4. In a bike showroom, there are 475 bikes. Out of them 175 are sold. How many are left after sale?
Total bikes in showroom = 475
Bikes sold = 175
Bikes left = 475 − 175 = 300 bikes
Worksheet 7 (Page 30) — Subtraction by Estimation
1. Find the answer with Estimation.
a) 382 − 140: 382 is nearer to 400, 140 is nearer to 100 → 400 − 100 = 300
b) 525 − 305: 525 is nearer to 500, 305 is nearer to 300 → 500 − 300 = 200
c) 685 − 540: 685 is nearer to 700, 540 is nearer to 500 → 700 − 500 = 200
d) 999 − 564: 999 is nearer to 1000, 564 is nearer to 600 → 1000 − 600 = 400
2. The school has ₹6960 in total as grant. They spent ₹2321 for snacks. Estimate to the nearest hundred how much money remains.
Total grant (rounded) = 6960 ≈ 7000
Amount spent (rounded) = 2321 ≈ 2300
Estimated remaining amount = 7000 − 2300 = ₹4700
3. A farmer harvested 3468 guavas and sold 1749 of them. Estimate the remaining fruits to the nearest hundred.
Guavas harvested (rounded) = 3468 ≈ 3500
Guavas sold (rounded) = 1749 ≈ 1700
Estimated remaining guavas = 3500 − 1700 = 1800 guavas
4. There are 195 mangoes in a basket. 157 are sold. Estimate the remaining fruits to the nearest hundred. ( )
Mangoes in basket (rounded) = 195 ≈ 200
Mangoes sold (rounded) = 157 ≈ 150
Estimated remaining mangoes = 200 − 150 = 50
Answer: C) 50
Self Assessment — 1 (Page 31)
1. Do the Subtractions.
a) 486 − 273 = 213
b) 739 − 458 = 281
2. Fill in the blanks.
a) How many more rupees are needed to make 550 equal to 750?
Required total = 750
Amount already = 550
More rupees needed = 750 − 550 = ₹200
b) 375 + 125 = 500
c) 700 + 200 = 900 can be written as 900 − 700 = 200 and 900 − 200 = 700
3. Find the mistakes in the following problems and correct it.
a) 453 − 30 (shown answer 153 is wrong)
Correct subtraction: 453 − 30 = 423
b) 745 − 295 (shown answer 550 is wrong)
Correct subtraction: 745 − 295 = 450
4. A villager donated 125 blankets last year and 270 blankets this year. How many additional blankets did he donate this year?
Blankets donated this year = 270
Blankets donated last year = 125
Additional blankets donated = 270 − 125 = 145 blankets
Self Assessment — 2 (Page 32)
1. A customer gives a ₹500 rupee note for a bill of ₹215. How much amount will he get back?
Amount given = ₹500
Bill amount = ₹215
Amount returned = 500 − 215 = ₹285
2. There are 350 books in a shelf. Out of them 139 are kept on one side. How many are on the other side?
Total books = 350
Books on one side = 139
Books on other side = 350 − 139 = 211 books
3. In a sports shop, there are 600 bats. 350 bats are sold out. How many bats remain?
Total bats = 600
Bats sold = 350
Bats remaining = 600 − 350 = 250 bats
4. Which number comes after 800, 750, 700, 650, ___? ( )
The pattern decreases by 50 each time: 800, 750, 700, 650, 600
Answer: C) 600
5. The difference in tens place value of 352 and 479 is ___. ( )
Tens place value of 352 = 50
Tens place value of 479 = 70
Difference = 70 − 50 = 20 = 2 tens
Answer: D) 2 tens
