add
subtract
skip counting
even/odd
rounding
100
45 +96 ____
141
100
46 -23 ____
23
100
2,4,6,_____, _____, _____
8, 10, 12
100
45
odd
100
round to the nearest 10: 84
80
200
456 +123 _____
579
200
568 - 267 _____
301
200
5 , 10, 15, 20, _____, ____, _____
25, 30, 35
200
357
odd
200
round to the nearest 10: 79
80
300
789 +159 _____
948
300
728 - 503 ____
225
300
500, 600, 700, ____, ____, ____
800, 900, 1000
300
896
even
300
round to the nearest 10; 42
40
400
897 +956 _____
1853
400
93 - 48 ____
45
400
80, 70, 60, ____, ____, ____
50, 40, 30
400
1286
even
400
round to the nearest 100: 586
600
500
7596 +5896 ______
13492
500
753 - 289 _____
464
500
165, 160, 155, ____, _____, _____
150, 145, 140
500
35,487
odd
500
round to the nearest 100: 980
1000
M
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u