Estimating Sums and Differences to the Nearest 10

Mrs. Doubtfire baked 3,219 cookies for a bake sale. Later she baked 5,689 more cookies. What is a reasonable estimate for the number of cookies she baked.

• 9,000

• 3,000

• 2,000

• 8,000

Ethan and Jedaiah collect Pokemon cards. Ethan has 129 Pokemon cards. Jedaiah has 47 Pokemon cards. Estimate the difference between the boys' Pokemon cards.

• 82

• 100

• 80

• 70

Samiyah and Ainsley are raising money for a good cause! Samiyah worked hard to raise $29,987. Ainsley also worked really hard and raised $44,908. Estimate the sum of how much Samiyah and Ainsley earned altogether.

• $70,000

• $20,000

• $60,000

• $10,000

A total of 2,691 people attended the school play. A total of 1,521 people attended the band concert. About how many more people attended the play than the concert?

• 1,100

• 1,170

• 500

• 1,200

Which of the following is the best estimate for the equation:

70.2 - 59.7

• 25

• 10

• 3

• 19

A (n) ______________ is an approximate answer

• sum

• estimate

• product

Which difference is about 10?

• 33.2 - 28.4

• 70.9 - 58.7

• 42.5 - 16.8

• 65.7 - 65.6

Which is the BEST estimate for 61.4 + 88.3?

• 100

• 140

• 150

• 200

Cody buys a baseball bat for $164.50. About how much does the bat cost if you round to the nearest ten?

• 165

• 150

• 160

• 170

Cody buys a baseball glove for 37.25. About how much does the glove cost if we round to the nearest ten?

• 35

• 30

• 50

• 40