Fluently Adding and Subtracting Numbers Greater Than 1000

Find each sum or difference. Then use front-end estimation to check that your answers are reasonable. 8,142 + 3,154 =

• Estimated value

  11,000

• Estimated value

  12,000

• Estimated value

  11,500

• Estimated value

  10,000

About how much more is 9,309,132 than 1,999,999?

• 7,309,133

• 8,309,133

• 11,309,131

• 7,000,000

• 11,000,000

Which of the following would be a reasonable estimate for the sum of 1,992 + 2,244?

• 3,000

• 2,000

• 4,000

• 5,000

Estimate the difference of 7,900-2,999 by rounding to the nearest thousands

• 6,000

• 4,000

• 5,000

• 3,000

What is the estimated sum of 21,654 + 13,837?

• 35,491

• 30,000

• 10,000

• 20,000

About how much more is 8,398 than 1,209?

• 9,000

• 7,189

• 8,189

• 7,000

Estimate : 3874 – 1878

• 2000

• 1996

• 2200

• 1000

Estimate the following sum

1,543 + 5,798

• 7,000

• 800

• 8,000

• 800,000

Estimate to the thousands place.
38,674 + 83,102 =

• 122

• 122,000

• 120,000

• 121,776

Estimate: 4,804 - 3,479