Practice questions available in **McGraw Hill Math Grade 6 Answer Key PDF Lesson 1.3 Estimating Sums and Differences** will engage students and is a great way of informal assessment.

## McGraw-Hill Math Grade 6 Answer Key Lesson 1.3 Estimating Sums and Differences

**Exercises Estimate**

Question 1.

54 + 21

Answer:

54

+21

75

The sum of two numbers 54 and 21 is 75.

The actual sum is 75

The estimated sum is 80.

Question 2.

1124 – 555

Answer: 569

1124

-555

569

The difference of the two numbers 1124 and 555 is 569.

The actual difference is 569

The estimated difference is 600

Question 3.

3 + 44

Answer: 47

44

+3

47

The sum of two numbers 44 and 3 is 47.

The actual sum is 47

The estimated sum is 50.

Question 4.

5 + 29

Answer: 34

29

+5

34

The sum of two numbers 29 and 5 is 34

The actual sum is 34

The estimated sum is 30

Question 5.

44 + 46

Answer: 90

44

46

90

The sum of two numbers 44 and 46 is 90.

The actual sum is 90

The estimated sum is 100

Question 6.

670 + 650

Answer: 1320

670

+650

1320

The sum of the two numbers 670 and 650 is 1320

The actual sum is 1320

The estimated sum is 1300

Question 7.

67 – 33

Answer: 34

67

-33

34

The difference of the two numbers 67 and 33 is 34

The actual difference is 34

The estimated difference is 30

Question 8.

655 – 211

Answer: 444

655

-211

444

The difference of the two numbers 655 and 211 is 444

The actual difference is 444

The estimated difference is 400

Question 9.

431 – 251

Answer: 180

431

-251

180

The difference of the two numbers 431 and 251 is 180

The actual difference is 180

The estimated difference is 200

Question 10.

1110 + 250

Answer: 1360

1110

+250

1360

The sum of the two numbers 1110 and 250 is 1360

The actual sum is 1360

The estimated sum is 1400

Question 11.

645 + 655

Answer: 1300

655

+645

1300

The sum of the two numbers 645 and 655 is 1300

The actual sum is 1300

The estimated sum is 1300

Question 12.

533 + 566

Answer: 1099

533

+566

1099

The sum of the two numbers 533 and 566 is 1099

The actual sum is 1099

The estimated sum is 1100

Question 13.

133 + 5675

Answer: 5808

5675

+133

5808

The sum of the two numbers 5675 and 133 is 5808

The actual sum is 5808

The estimated sum is 5800

Question 14.

1333 + 56750

Answer: 58083

56750

+1333

58083

The sum of the two numbers 56750 and 1333 is 58083

The actual sum is 58083

The estimated sum is 58000

Question 15.

677 – 532

Answer: 145

677

-532

145

The difference of the two numbers 677 and 532 is 145

The actual difference is 145

The estimated difference is 150

Question 16.

444 + 555

Answer: 999

444

555

999

The sum of the two numbers 444 and 555 is 999

The actual sum is 999

The estimated sum is 1000

Question 17.

1267 + 3487

Answer: 4754

3487

+1267

4754

The sum of the two numbers 3487 and 1267 is 4754

The actual sum is 4754

The estimated sum is 5000.

Question 18.

21111 – 14750

Answer: 6361

21111

-14750

6361

The difference of the two numbers 21111 and 14750 is 6361

The actual difference is 6361

The estimated difference is 6300

Question 19.

4545 + 5459

Answer: 10004

4545

+5459

10004

The sum of the two numbers 4545 and 5459 is 10004

The actual sum is 10004

The estimated sum is 10000.

Question 20.

750 – 449

Answer: 301

The difference of the two numbers 750 and 449 is 301

The actual difference is 301

The estimated difference is 300