MRS MCCORMACK'S MATHEMATICIANS

Rounding to the nearest ten

100

Round 28 to the nearest ten.

30.

200

Round 81 to the nearest ten.

80

300

Round 119 to the nearest ten.

120

400

Round 313 to the nearest ten. 

310.

500

Round 765 to the nearest ten.

770.

Rounding to the nearest hundred

100

Round 134 to the nearest hundred.

100

200

Round 352 to the nearest hundred.

400

300

Round 902 to the nearest hundred

900

400

Round 265 to the nearest hundred?

300

500

Which two numbers rounded to the nearest hundred is 400 from the list below:

352 403 276 453

352 and 403

Rounding to the nearest ten and hundred

100

Round 134 to the nearest ten and hundred.

Ten: 130 Hundred: 100

200

Round 248 to the nearest ten and hundred.

Nearest ten: 250  

Nearest hundred:200

300

Round 902 to the nearest ten and hundred.

Ten: 900

Hundred: 900

400

Round 191 to the nearest ten and hundred.

Ten: 190

Hundred:200

500

Round to 323 to the nearest ten and hundred.

Ten: 320

Hundred: 300

Estimate the Sum

100

Estimate the sum by rounding to the nearest ten:

32 + 25=

Answer:

60

200

Estimate the sum by rounding to the nearest hundred:

605+183

Answer:

800

300

Estimate the sum by rounding to the nearest hundred: 

132 + 323 =

Answer:

400

400

Estimate the sum by rounding to the nearest ten:

124 + 608 =

Answer:

730

500

What is a possible number that would round to the nearest hundred to make this true:

440 + ________ = 700

Mrs. McCormack will approve your answers.

Mental Math

100

Subtract:

54-23

Answer:

31

200

Subtract:

845-135

Answer:

710

300

Add:

332 + 241 = 

Answer:

573

400

Subtract:

 750-620 =

Answer:

130

500

Add

163 + 132 =

Answer:

295