Show:
Addition with regrouping
Subtraction with regrouping
10 more 10 less 100 more 100 less
Associative property
Bonus points
100

480+228=

508

100

123-45=

78

100

100 more than 398 is

498

100

(6 + 2) + 2 =

(6 + 2) + 2 = 6 + (2 + 2)

8+2 = 6+ 4

10 = 10

100

Solve using expanded

374+518=

892

200

300+220=

520

200

432-56=

376

200

10 less than 908 is

898

200

= 10 + (4 + 5)

(10 + 4) + 5 = 10 + (4 + 5) 

14 + 5 = 10 + 9

19 = 19

200

Expanded form


425+232=

657

300

814+79=

893

300

407-110=

297

300

100 less than 101

1
300

(14 + 9) + 5 =

(14 + 9) + 5 = 14 + (9 + 5)

23 + 5 = 14 + 14

28 = 28


300

Expanded form


567 + 324 =

891

400

547+378=

925

400

574-387=

187

400

10 more than 868

878

400

= 18 + (6 + 10)

(18 + 6) + 10 = 18 + (6 + 10)

24 + 10 = 18 + 16

34 = 34

400

Base ten word form


438

4 hundreds 3 tens 8 ones

500

800+211=

1,011

500

900-54=

846

500

100 less than 1,008

908

500

(26 + 7) + 8 =

(26 + 7) + 8 = 26 + (7 + 8)

33 + 8 = 26 + 15

41 = 41

500

base ten word form

569

5 hundreds 6 tens 9 ones