Show:
Add Like Terms
Add by Making a Ten/Hundred
Add using Compensation/Arrow Way
Subtract by Making a Ten/Hundred
Subtract using Compensation/Arrow Way
100

Add these numbers using add like terms:

52 + 37 =

52 + 37 =

50 + 2 + 30 +7 

80 + 9

89

100

Add by making a ten/hundred.

99 + 17

99 + 17

99 1 16

100 + 16 = 116

100

Add using compensation by arrow way/number line:

199 + 56

199 + 56 = 255


56 + 200= 256

256 - 1 = 255

100

Subtract by making a ten/hundred:

42 - 19

42 - 19 =

(22 + 20) 19

20 - 19= 1

22 + 1 = 23

100

Subtract using compensation:

62 - 38=

62 - 38 = 24

add 2 to 38 to make a ten, add it to 62 too

64 - 40 = 24

200

Add using like terms:


240 + 39 =

240 + 39 =

200 + 40 + 30 + 9 

200 + 70 + 9 = 279

200

Add by making a ten/hundred.

33 + 98

33 + 98 =

31 2 98

31 + 100 = 131

200

Add using compensation by arrow way/number line:

697 + 234 =

697 + 234 = 931

234 + 700 = 934

934 - 3 = 931

200
Subtract by making a ten/hundred:

160 - 49 =

160 - 49 =

(110 + 50) - 49

50 - 49 = 1

110 + 1 = 111

200

Subtract using compensation:

430 - 280

430 - 280 = 150

add 20 to 280 to make a hundred, add 20 to 430 too

450 - 300 = 150

300

Add using like terms:


664 + 320 =

664 + 320 =

600 + 60 + 4 + 300 + 20

900 + 80 + 4

984

300

Add by making a ten/hundred.

199 + 43 =

199 + 43 =

199 1 42

200 + 42 = 242

300

Add using compensation by arrow way/number line:

25 + 399

25 + 399 = 424

25 + 400 = 425

425 - 1 = 424

300

Subtract by making a ten/hundred:

120 - 98 = 

120 - 98 = 22

(20 + 100) - 98

100 - 98 = 2

20 + 2 = 22

300

Subtract using compensation:

220 - 190

220 - 190 = 30

add 10 to 190 to make a benchmark number, add 10 to 220 too

230 - 200 = 30

400

Subtract using like terms:

876 - 562

876 - 562

800 - 70 - 6 / 500 - 60 - 2

800 - 500 = 300

70 - 60 = 10

6 - 2 = 4

300 + 10 + 4 = 314

400

Add by making a ten/hundred.

398 + 145


398 + 145

398 2 143

400 + 143 = 543

400

Add using compensation by arrow way/number line:

157 + 498

157 + 498 = 

157 + 500 = 657

657 - 2 = 655

400

Subtract by making a ten/hundred:

520 - 98 = 

520 - 98 =

(420 + 100) - 98

100 - 98 = 2

420 + 2 = 422

400

Subtract using compensation:

603 - 329

603 - 329=

subtract 4 from both

599 - 325 = 274

500

Subtract using like terms:

381 - 170 =

381 - 170 = 

300 80 1 100 70

300 - 100 = 200

80 - 70 = 10 

200 + 10 + 1 = 211


500

Add by making a ten/hundred.

55 + 97

55 + 97

52 3 97

52 + 100 = 152

500

Add using compensation by arrow way/number line:

398 + 146

398 + 146 = 544

146 + 400 = 546

546 - 2 = 544

500

Subtract by making a ten/hundred:

501 - 299


501 - 299 = 202

(201 + 300) - 299

300 - 299 = 1

201 + 1 = 202

500

Subtract using compensation:

400 - 158

400 - 158 =

subtract 1 from both

399 - 157 = 242