Estimate Decimal Sums and Differences

Estimate to the ten thousands place.  
47,623 - 12,385 =

• 40

• 34,238

• 40,000

• 30,000

Estimate to the thousands place.
847,167 - 382,208 =

• 500,000

• 464,000

• 464,959

• 465,000

Estimate to the thousands place.
6,375 - 1890 =

• 4,485

• 4,500

• 4,000

• 5,000

Estimate the sum by rounding each number to the nearest whole number and then adding.

7.114 + 6.122

The sum is approximately

Estimate the sum of 35.89 and 22.14

• 58

• 56

• 57

• 59

What is the best estimate of this sum?9.91 + 12.3 = ______

• 19

• 20

• 22

What is the best estimate of this sum?9.91 + 12.3 = ______

• 19

• 20

• 22

Paula wants to buy 3 shirts and 2 belts. The shirts cost $16.89 each, and the belts cost $8.97 each. Paula has $45.Which of these amounts is the best estimate of how much more money Paula needs in order to buy the shirts and belts?

• $16

• $10

• $24

• $5

What is the best estimate of 0.94 + 2.66

• 2

• 3

• 4