AP 3rd Maths Addition Workbook Answers, APSCERT 3rd Mat 2nd Unit Solutions
Worksheet 1 — Addition of 2-Digit Numbers 3rd Maths Addition
1.
a) 66 + 31 = 97
b) 74 + 13 = 87
c) 27 + 55 = 82
d) 45 + 18 = 63
2. A box has 48 pencils. If you add 12 more pencils, how many pencils will be there?
Answer
Number of pencils in the box = 48
Pencils added = 12
Total pencils = 48 + 12 = 60 pencils
3. 45 + 15 = 70. Is this correct answer? If not correct it.
Answer
45 + 15 = 60, so the given answer 70 is not correct. The correct answer is 60.
4.
a) 28 + 33 = 61
b) 39 + 13 = 52
c) 64 + 17 = 81
5. Sum of the numbers 59, 76 = 135 → Option A) 412 is wrong; correct answer is 135 (B)
Worksheet 2 — Addition of 2-Digit Numbers 3rd Maths Addition
1.
a) Seventy + Eighty = 70 + 80 = 150
b) Forty four + Sixty five = 44 + 65 = 109
c) Thirty four + Ninety five = 34 + 95 = 129
d) Ninety + Ten = 90 + 10 = 100
2. Chandini scored 42 marks in Maths and 37 marks in English. What is her total score?
Answer
Marks in Maths = 42
Marks in English = 37
Total score = 42 + 37 = 79 marks
3. In a school library, there are 34 story books and 45 picture books. Find the total number of books.
Answer
Story books = 34
Picture books = 45
Total books = 34 + 45 = 79 books
4. There were 34 passengers in a bus. At the next bus stop, 18 more passengers boarded the bus. How many passengers are in the bus now?
Answer
Passengers already in the bus = 34
Passengers who boarded = 18
Total passengers now = 34 + 18 = 52 passengers → Option C) 52
Worksheet 3 — Addition of 1-Digit with 3-Digit Numbers
1.
a) 360 + 6 = 366
b) 361 + 4 = 365
c) 363 + 5 = 368
d) 357 + 2 = 359
2.
a) 534 + 2 = 536
b) 587 + 6 = 593
c) 698 + 5 = 703
d) 763 + 4 = 767
3.
a) '5' more than 360 = 365
b) '7' more than 722 = 729
c) '1' more than 162 = 163
4. What is the sum of the greatest 3-digit number and the smallest one digit number?
Answer
Greatest 3-digit number = 999
Smallest one-digit number = 1
Sum = 999 + 1 = 1000 → Option B) 1000
Worksheet 4 — Addition of 2-Digit with 3-Digit Numbers
1.
a) 123 + 45 = 168
b) 350 + 20 = 370
c) 469 + 30 = 499
d) 786 + 13 = 799
2. Match the following.
120 + 6 = 126
646 + 52 = 698
333 + 4 = 337
541 + 44 = 585
900 + 99 = 999
3. There are 245 students in a school. 12 students have newly joined. How many students are there in that school now?
Answer
Students already in school = 245
Newly joined students = 12
Total students now = 245 + 12 = 257 students
4. A library has 509 books. 11 new books are added to them. Find the total number of books.
Answer
Books in library = 509
New books added = 11
Total books = 509 + 11 = 520 books
5. Which of the following two numbers sum equal to 400?
Answer
a) 385 + 25 = 410
b) 375 + 20 = 395
c) 382 + 18 = 400 ✔
d) 345 + 65 = 410
Option C) 382 + 18
Worksheet 5 — Addition of 3-Digit with 3-Digit Numbers
1. Write the suitable numbers in boxes.
a) 377 + 612 = 989
b) 414 + 453 = 867
c) 425 + 343 = 768 (any pair of 3-digit numbers adding to 768, with first number starting 42, works; one possible pair shown)
d) 474 + 475 = 949 (any two numbers adding to 949 are acceptable; one possible pair shown)
2. Yaswanth has ₹315. His mother gave him ₹250, how much amount Yaswanth has now?
Answer
Amount Yaswanth had = ₹315
Amount given by mother = ₹250
Total amount now = 315 + 250 = ₹565
3. Compare the results of 321 + 123 and 123 + 321. What do you observe?
Answer
321 + 123 = 444
123 + 321 = 444
Both sums are equal. This shows that changing the order of numbers in addition does not change the sum (commutative property of addition).
4. A godown has 321 rice bags. If 123 rice bags are added, how many rice bags will be there in the godown?
Answer
Rice bags already in godown = 321
Rice bags added = 123
Total rice bags = 321 + 123 = 444 rice bags
Worksheet 6 — Addition of 3-Digit Numbers APTEACHERS.IN
1.
a) 377 + 666 = 1043
b) 829 + 374 = 1203
c) 617 + 667 = 1284
d) 703 + 969 = 1672
2. A student wrote the sum of 472 + 356 is 728. Verify the answer and correct it.
Answer
472 + 356 = 828
The student's answer 728 is incorrect. The correct sum is 828.
3. In 345, 678, 432, 567, which of these two numbers should be added to get more than 1000?
Answer
Adding the two largest numbers: 678 + 567 = 1245, which is more than 1000.
(678 + 432 = 1110 also gives a sum more than 1000.)
4. Find the sum of the greatest 3-digit number and the smallest 3-digit number.
Answer
Greatest 3-digit number = 999
Smallest 3-digit number = 100
Sum = 999 + 100 = 1099 → Option A) 1099
Worksheet 7 — Addition with Estimation 3rd Maths Addition
1. Estimate the sums rounding each number to the nearest 100.
a) 389 + 514 → 400 + 500 = 900
b) 178 + 124 → 200 + 100 = 300
c) 684 + 217 → 700 + 200 = 900
d) 1249 + 3768 → 1200 + 3800 = 5000
2. There are 245 boys and 782 girls in a school. Estimate and write the total number of students.
Answer
Boys (rounded) = 200
Girls (rounded) = 800
Estimated total students = 200 + 800 = 1000 students
3. A shopkeeper sold two items worth ₹398 and ₹612 in a day. Estimate and write the total amount he earned.
Answer
First item (rounded) = ₹400
Second item (rounded) = ₹600
Estimated total earning = 400 + 600 = ₹1000
4. A student estimated the result of 879 + 421 as 1,400. Is it correct?
Answer
879 rounded to nearest hundred = 900
421 rounded to nearest hundred = 400
Estimated sum = 900 + 400 = 1300
The student's estimate of 1400 is not correct; the correct estimate is 1300.
5. Estimate and write any two 3-digit numbers, whose sum is 1000.
Answer
Example: 400 + 600 = 1000, or 350 + 650 (rounds to 400 + 700 = 1000). (Answers may vary)
Self Assessment
1.
a) 324 + 185 = 509
b) 462 + 138 = 600
2. In a fruit shop there are 378 guavas, 295 oranges, and 412 mangoes. How many fruits are there in total?
Answer
Guavas = 378, Oranges = 295, Mangoes = 412
Total fruits = 378 + 295 + 412 = 1085 fruits
3. After selling 365 rice bags, 435 bags were remained in the godown. How many rice bags were there at first?
Answer
Rice bags sold = 365
Rice bags remaining = 435
Rice bags at first = 365 + 435 = 800 rice bags
4. Make a word problem using 245 + 375.
Answer (Example)
A school has 245 boys and 375 girls. How many students are there in total?
Total students = 245 + 375 = 620 students
5. Estimate the sum of 276 and 489 by rounding each number to the nearest hundred.
Answer
276 rounds to 300, 489 rounds to 500
Estimated sum = 300 + 500 = 800 → Option C) 800
6.
a) 425 + 132 = 557
b) 247 + 187 = 434
7. There are 450 kg of rice in a school. After receiving 275 kg of rice, the total weight of rice becomes 725 kg.
Answer
450 + 275 = 725 kg
8. Komaraiah sold 123 pots on Wednesday and 207 pots on Thursday. How many pots did he sell in two days?
Answer
Pots sold on Wednesday = 123
Pots sold on Thursday = 207
Total pots sold = 123 + 207 = 330 pots
9. By estimation, circle the answer rounded to nearest 100s.
a) 158 + 271 (actual = 429) → rounds to 400
b) 481 + 8 (actual = 489) → rounds to 500
c) 874 + 111 (actual = 985) → rounds to 1000
