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Problemas
Autor :
Andrea Torres Diaz
1.
______+7=34, porque 34-7=_____
A.
27
B.
78
C.
12
2.
_____+9=21, porque 21-9=_____
A.
54
B.
12
C.
18
3.
_____+11=32, porque 32-11=_____
A.
4
B.
32
C.
21
4.
_____+20=30, porque 30-20=_____
A.
1
B.
10
C.
15
5.
_____+8=18, porque 18-8=_____
A.
9
B.
11
C.
10
6.
_____-11=17, porque 17+11=_____
A.
28
B.
43
C.
23
7.
_____-22=13, porque 13+22=_____
A.
9
B.
35
C.
13
8.
_____-18=9, porque 9+18=_____
A.
13
B.
17
C.
27
9.
_____-15=16. porque 16+15=_____
A.
23
B.
31
C.
15
10.
_____-21=3, porque 21+3=_____
A.
9
B.
3
C.
24