Estimate
Multiplication
Addition
Subtraction
Make it!
100
28+64
80, 90 or 100
100
8X2
16
100
10+30
40
100
Ten less than 56
46
100
Something that comes in pairs.
Gloves, Socks, Shoes (others)
200
99-62
30 or 40
200
3X11
33
200
25+42
67
200
10 less than 72
62
200
Expanded notation for 463
400+60+3
300
32+46
70, 80 or 90
300
4X5
20
300
51+63
114
300
25-15
10
300
Order these numbers from smallest to largest 23, 42, 16, 37, 10, 5
5, 10, 16, 23, 37, 42
400
121+87
200, 210, or 220
400
5X6
30
400
122+35
157
400
26-12
14
400
Show what 14 in equal groups of 2 looks like
II II II II II II II
500
381-246
100, 130, or 140
500
6X7
42
500
241+369
610
500
86-43
43
500
Make an Array for 15
M
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