Rounding to Specific Place & Estimating with Compatible Numbers - NICHOLAS GLAESER | Library

When it says round to a specific place, use place value to round. When it says compatible numbers, use numbers that will be easy to work with, but not to far away from the original number.

Example: 53 x 416 + 161 = could round to be 50 X 420 + 160

3

Estimate the sum by rounding each number to the nearest hundred.  

21,548 + 13,756 =
__________ + __________ = __________

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3

Estimate the difference by rounding each number to the nearest ten.

254 − 132 =
__________ − __________ = __________

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Estimate the quotient by rounding each number to the nearest 10.

375 ÷ 15 = __________

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3

Use compatible numbers to estimate the product.

788 × 58 = 

__________ × __________ = __________

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Use compatible numbers to estimate the sum.

5,348 + 253 =
__________ + __________ = __________

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3

Use compatible numbers to estimate the difference.

29,462 − 289 =
__________ − __________ = __________

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Use compatible numbers to estimate the quotient.

762 ÷ 76 =
__________ ÷ __________ = __________

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4

The shelf in the supermarket contains 452 medium sized lobsters. If each lobster weighs 2 pounds. What is the best estimate of the total weight of the lobsters on the shelf?

__________ __________ __________ = __________

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Last month Alicia deposited $2,342.00 to her bank account. This month, she deposited $1,786.00 to her bank account. What is the best estimate to her bank account last month and this month?

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Last month Marion harvested 34 baskets of green bell peppers and 41 baskets of red bell peppers from his farm. Each basket contained 20 bell peppers. What is the best estimate of the total number of bell peppers that Marion harvested last month?

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Last year Margret took a total of 63 quizzes in her Math class. There were 25 questions in each of these quizzes. What is the best estimate for the total number of questions Margret had in the quizzes she took in Math class last year?

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There are 252 students in the 5th Grade at Tumbleweed Academy. There is an equal number of students in each of the 12 different classrooms in 5th grade. What is the best estimate of the number of students in each class?

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Princeton School equally distributed 164 new books to 4 different classes. For every book that a class received, the school also provided 9 worksheets. What is the best estimate for the total number of worksheets each class received?

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There are 23 pear trees in Ronald's orchard. He counted 56 pears in each tree. What is the best estimate of the total number of pears in all the trees in Ronald's orchard?

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The Music Club ordered 57 new microphones at $96.00 each, and 28 new sets of uniforms at $32.00 each set. What is he best estimate for the total cost of the microphones and uniforms that the Music Club ordered?

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