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Cálculo mental 2º
Autor :
Irene de la Vega Benito
1.
2+3+2
A
7
B
6
C
8
2.
4+5+3
A
11
B
10
C
12
3.
2x3
A
9
B
6
C
5
4.
10-3-4
A
4
B
3
C
2
5.
20+32
A
62
B
42
C
52
6.
40-38
A
1
B
3
C
2
7.
5+10+12
A
27
B
26
C
28
8.
100+50
A
150
B
200
C
105
9.
145+15
A
170
B
160
C
155
10.
150-125
A
24
B
25
C
35
11.
30+30+30
A
60
B
90
C
80
12.
105+105
A
200
B
205
C
210
13.
45+45
A
90
B
85
C
80
14.
84+12
A
95
B
96
C
97
15.
2x50
A
100
B
50
C
150
16.
9x2
A
17
B
28
C
18