Rounding and Estimation

Estimate the sum of 48 and 73.

• 110

• 120

• 140

• 125

Answer explanation

To estimate the sum of 48 and 73, round each number to the nearest tens place (50 and 70) and then add them together to get 120, which is the closest choice.

Estimate the product of 25 and 14.

• 320

• 280

• 300

• 350

Answer explanation

To estimate the product of 25 and 14, round both numbers to the nearest tens: 25 becomes 30 and 14 remains 14. Multiply the rounded numbers: 30 x 14 = 420. The closest answer choice is 300, which is the correct estimation.

Round 789 to the nearest hundred.

• 700

• 750

• 800

• 850

Answer explanation

To round 789 to the nearest hundred, we look at the tens digit, which is 8. Since 8 is 5 or greater, we round up to the next hundred, giving us 800.

Estimate the difference between 96 and 58.

• 38

• 24

• 42

• 16

Answer explanation

To find the difference between 96 and 58, subtract 58 from 96 which equals 38. Therefore, the correct answer is 38.

Round 3456 to the nearest thousand.

• 6000

• 5000

• 4000

• 3000

Answer explanation

To round 3456 to the nearest thousand, we look at the hundreds place, which is 5. Since 5 is greater than or equal to 5, we round up to 4000.

Estimate the quotient of 72 divided by 9.

• 10

• 7

• 8

• 6

Answer explanation

To estimate the quotient of 72 divided by 9, we can round 72 to the nearest multiple of 9, which is 72. Therefore, the quotient is 8.

Estimate the sum of 347 and 219.

• 600

• 560

• 450

• 500

Answer explanation

To estimate the sum of 347 and 219, round both numbers to the nearest hundred, giving 300 and 200. Add these rounded numbers to get 500, which is the estimated sum.

Round 9876 to the nearest thousand.

• 10000

• 9000

• 9500

• 11000

Answer explanation

To round 9876 to the nearest thousand, we look at the hundreds place, which is 8. Since 8 is greater than or equal to 5, we add 1 to the thousands place, making it 10. Therefore, 9876 rounded to the nearest thousand is 10000.

Round off 2,34,678 to the nearest TEN THOUSANDS.

• 2,35,000

• 2,30,000

• 2,40,000

• 2,33,000

Answer explanation

Choose 2,30,000 as it is the nearest ten thousand to 2,34,678.

Round of 3,35,45,709 to the nearest ten lakhs.

• 3,30,00,000

• 3,50,00,000

• 3,45,00,000

• 3,40,00,000

Answer explanation

To round 3,35,45,709 to the nearest ten lakhs, we look at the digit in the ten lakhs place, which is 4. Since the digit in the lakhs place is 5 or more, we round up to 3,40,00,000.