Rounding to Subtract

Estimate to subtract 235 - 116 by rounding to the nearest tens.

• 230 - 110 = 120

• 240 - 120 = 120

• 240 - 110 = 130

• 230 - 120 = 110

Estimate to subtract 842 - 511 by rounding to the nearest tens.

• 800 - 500 = 300

• 840 - 520 = 320

• 840 - 510 = 330

• 840 - 500 = 340

Estimate the difference of 470-289 by rounding to the nearest hundreds

• 300

• 100

• 181

• 200

Use rounding to the nearest hundred to estimate the difference.
  328
- 199
________

• 100

• 200

• 400

• 300

Round to the TENS place and then subtract

• 700 - 200 = 500

• 800 - 200 = 600

• 770 - 260 = 510

Estimate how many more miles were run last year than this year by rounding each number in the table to the nearest hundred and solving the problem

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

• 6,000

• 4,000

• 5,000

• 3,000

Round each decimal to the nearest one.  Then subtract.
42.01 - 5.92 =

• 37

• 36

• 33

• 48