Addition?
10 + 10 + 10
30
15 - 9
6
MENTAL MATH
155 + 245 = ?
400
3 x 2 or 3 groups of 2
6
Which digit is in the ones place?
32
2
100 - 100
0
250-149
101
MENTAL MATH
37 + 63 =
100
50
Which digit is in the tens place?
76
7
12 + 8
20
57 - 38
19
345 + 134 =
479
Which digit is in the hundreds place?
123
1
126 + 124
250
Mental Math
61-17 =
44
MENTAL MATH
10 + ___ = 241
231
9 x 4 or 9 groups of 4
36
Which digit is in the ones place 2,345
5
413 + 227
643
649-338
311
MENTAL MATH
98 + 499 =
597
2 x 4 or 2 groups of 4
8
Which digit is in the tens place?
784
8