Estimating Sums

Which of the following COULD be used to estimate the sum 486 + 503? (MARK ALL THAT APPLY)

• 500 + 500 = 1,000

• 490 + 500 = 990

• 400 + 500 = 900

• 1,000 + 1,000 = 2,000

Which of the following COULD be used to estimate the sum 5,759 + 2,958? (MARK ALL THAT APPLY)

• 6,000 + 3,000 = 9,000

• 5,800 + 3,000 = 8,800

• 5,760 + 2,960 = 8,720

• 5,000 + 3,000 = 8,000

Which of the following would be the MOST ACCURATE estimate for 486 + 503?

• 500 + 500 = 1,000

• 490 + 500 = 990

• 400 + 500 = 900

• 1,000 + 1,000 = 2,000

Which of the following COULD be used to estimate the sum of 925 + 416? (MARK ALL THAT APPLY)

• 900 + 400 = 1,300

• 930 + 420 = 1,350

• 1,000 + 400 = 1,400

• 1,000 + 500 = 1,500

Which of the following would be the MOST ACCURATE estimate for the sum of 925 + 416? (MARK ALL THAT APPLY)

• 900 + 400 = 1,300

• 930 + 420 = 1,350

• 1,000 + 400 = 1,400

• 1,000 + 500 = 1,500

What COULD 1,879 round to? (MARK ALL THAT APPLY)

• 2,000

• 1,000

• 1,900

• 1,800

• 1,880

Which of the following COULD be used to estimate the sum of 3,604 + 5,132? (MARK ALL THAT APPLY)

• 4,000 + 5,000 = 9,000

• 3,600 + 5,100 = 8,700

• 3,600 + 5,130 = 8,730

• 3,000 + 5,000 = 8,000

Which of the following would be the MOST ACCURATE estimate for the sum of 3,604 + 5,132?

• 4,000 + 5,000 = 9,000

• 3,600 + 5,100 = 8,700

• 3,600 + 5,130 = 8,730

• 3,000 + 5,000 = 8,000

Is 900 a reasonable estimate for the sum of 232 + 501?

• Yes

• No

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