Addition with Regrouping

Front

321 + 145 =

Back

466

Front

345 + 129 =

Back

474

Front

33 birds + 18 birds fly over

Back

51

Front

If there are 12 bags of Skittles and you buy 9 more, how many bags are there now?

Back

21

Front

524 + 191 =

Back

715

Front

531 + 273 =

Back

804

Front

Fifteen dogs were in the girl's house, then 12 cats came. How many cats and dogs were at the house now?

Back

27

Front

Round to the tens: 471

Back

470

Front

Round to the tens: 35

Back

40

Front

Round to the hundreds: 715

Back

700