Add Like Terms
Add these numbers using add like terms:
52 + 37 =
52 + 37 =
50 + 2 + 30 +7
80 + 9
89
Add by making a ten/hundred.
99 + 17
99 + 17
99 1 16
100 + 16 = 116
Add using compensation by arrow way/number line:
199 + 56
199 + 56 = 255
56 + 200= 256
256 - 1 = 255
Subtract by making a ten/hundred:
42 - 19
42 - 19 =
(22 + 20) 19
20 - 19= 1
22 + 1 = 23
Subtract using compensation:
62 - 38=
62 - 38 = 24
add 2 to 38 to make a ten, add it to 62 too
64 - 40 = 24
Add using like terms:
240 + 39 =
240 + 39 =
200 + 40 + 30 + 9
200 + 70 + 9 = 279
Add by making a ten/hundred.
33 + 98
33 + 98 =
31 2 98
31 + 100 = 131
Add using compensation by arrow way/number line:
697 + 234 =
697 + 234 = 931
234 + 700 = 934
934 - 3 = 931
160 - 49 =
160 - 49 =
(110 + 50) - 49
50 - 49 = 1
110 + 1 = 111
Subtract using compensation:
430 - 280
430 - 280 = 150
add 20 to 280 to make a hundred, add 20 to 430 too
450 - 300 = 150
Add using like terms:
664 + 320 =
664 + 320 =
600 + 60 + 4 + 300 + 20
900 + 80 + 4
984
Add by making a ten/hundred.
199 + 43 =
199 + 43 =
199 1 42
200 + 42 = 242
Add using compensation by arrow way/number line:
25 + 399
25 + 399 = 424
25 + 400 = 425
425 - 1 = 424
Subtract by making a ten/hundred:
120 - 98 =
120 - 98 = 22
(20 + 100) - 98
100 - 98 = 2
20 + 2 = 22
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
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
Add by making a ten/hundred.
398 + 145
398 + 145
398 2 143
400 + 143 = 543
Add using compensation by arrow way/number line:
157 + 498
157 + 498 =
157 + 500 = 657
657 - 2 = 655
Subtract by making a ten/hundred:
520 - 98 =
520 - 98 =
(420 + 100) - 98
100 - 98 = 2
420 + 2 = 422
Subtract using compensation:
603 - 329
603 - 329=
subtract 4 from both
599 - 325 = 274
Subtract using like terms:
381 - 170 =
381 - 170 =
300 80 1 100 70
300 - 100 = 200
80 - 70 = 10
200 + 10 + 1 = 211
Add by making a ten/hundred.
55 + 97
55 + 97
52 3 97
52 + 100 = 152
Add using compensation by arrow way/number line:
398 + 146
398 + 146 = 544
146 + 400 = 546
546 - 2 = 544
Subtract by making a ten/hundred:
501 - 299
501 - 299 = 202
(201 + 300) - 299
300 - 299 = 1
201 + 1 = 202
Subtract using compensation:
400 - 158
400 - 158 =
subtract 1 from both
399 - 157 = 242