Addition
Subtraction
Rounding
Mystery ???
100

100 + 245 = 

345

100

456 - 52 = 

404

100

126 rounded to the nearest hundred is ...

100 ! 

100

4 x 6 =

24

200

255 + 122 = 

377

200

540 - 228 = 

312

200

849 rounded to the nearest hundred is...

800 !

200

3 x 5 =

15

300

399 + 415 = 

814

300

644 - 135

509

300

224 rounded to the nearest 10 is... 

220 !

300

10 x 10 =

100

400

135 + 644 = 

779

400

547 - 299 =

248

400

951 rounded to the nearest 10 is...

950 ! 

400

100 + 100 + 100 =

300

500

547 + 298 = 

845

500

566 - 347 = 

219