Say What
Open Number Line
I start at 40. I get 5 tens jumps. I get 8 one jumps.
Then what is my total?
40+58=?
98
50+50
100
40-7
33
6x1
6
Open Number Line
I start at 26. I have 3 tens jumps and 4 ones jumps.
How many are in all?
60
Mental Math!
117+190
307
Mental Math!!!!!
302+357=?
659
Mental Math
90-83
7
50x3
150
Hundred Chart
I circle 50. I go down 2. I go 9 right.
What did I circle?
79
Decompose
25 + 30 = ?
/ \
25 + 30 + 0
\ /
55 + 0 = ?
55
1+9
10
10-3
7
6x5
30
Break Apart
52 »| 50+2
37 »| 30+7
———————
80+9=?
89
Compensation
42+55=?
-2 +2
40+57=?
97
100+150
250
50-3
47
What is 50x2
100
Decompose
29+58=?
/\
29+50+8
\/
79+8=?
87
40+30=?
70
Mental Math
224+425
649
50-50
Nope… 0
Mental Math
50x50
2,500
Compensation
63+28=?
-2 +2
61+30=?
91