Set A and ?
Set B and ?
Set C and ?
Set D and ?
Set E and ?
100

135 + 152

What is 287

100

236 + 217. Estimate by ROUNDing TO THE NEAREST  TEN.

What is about 460.

100

2 planes leave an airport.  Each plane has 239 seats.  The first plane has 224 passengers.  The second plane has 189 passengers.  How many passengers are on both planes?

What is 413 passengers?

100

209 + 48 + 312=?

What is 569?

100

489-253=

What is 236?

200

650 + 138

What is 788

200

465 + 357.  Estimate by ROUNDING TO THE NEAREST TEN. 

What is about 830?

200

Mike's Cafe sells 237 sandwiches on Friday.  It sells 448 sandwiches on Saturday.  How many sandwiches are sold on both days?  

What is 685 Sandwiches?

200

412+273+139=?

What is 824?

200
856-328=

What is 528?

300

535 + 423

What is 953

300

Round 437 to the nearest ten.

What is 440?

300

654-456=?

What is 198?

300

146+86+53=?  ESTIMATE by rounding to the nearest ten.

What is about 290?

300

863-526=?  ESTIMATE by rounding to the nearest ten.  Then, find the difference.  

What is about 330?

400

Yvette takes 137 photographs on Friday.  She takes 248 photographs on Saturday.  How many photographs did she take in all?

What is 385

400

Round 389 to the nearest hundred.

What is 400?

400

543-345=?

What is 198?

400

125+224+306=?  ESTIMATE your answer by rounding to the nearest ten.

What is about 660?

400

306-198=?  Estimate by rounding to the nearest ten.  Then, find the difference.  

What is about 110?

500

Add 647+332=? using expanded form (stretch by place value).

What is:  600+40+7

              300+30+2

The sum is 900+70+9, or 979.

500

Round 541 to the nearest ten

What is 540?

500

945 -467=

What is 478?

500

A flower shop has 124 tulips, 235 roses, and 85 carnations.  How many flowers does the flower shop have?  ESTIMATE your answer by rounding to the nearest ten.  Then, find the sum.

What is about 450?

500

Damian's conservation club wants to plant 640 seedlings.  They have 172 seedlings that they still need to plant to meet their goal.  How many seedlings have they planted so far?  ESTIMATE by rounding first, then find the answer. 

What is 600-200=400?  About 400 seedlings have been planted.