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Cálculo mental
Autor :
Blanca Estela Rocha Sabino
1.
25 + 5 x 2=
A
30
B
60
C
45
2.
80 + ___= 150
A
50
B
60
C
70
3.
3 x 3 x 3 entre 3
A
7
B
9
C
6
4.
8 x 8 + ____= 80
A
16
B
18
C
26
5.
5.8 + 0.2=
A
6.10
B
7
C
6
6.
1902 es mayor, menor o igual que 1092
A
mayor
B
menor
C
igual
7.
505 es mayor, menor o igual que 50 x 4 + 200 + 100
A
menor
B
igual
C
mayor
8.
2/4 de 200
A
50
B
100
C
75
9.
6 x 9 + 20=
A
63
B
54
C
74
10.
5.2 + 0.8=
A
6.2
B
5.10
C
6
11.
45 entre 9 x 5=
A
25
B
55
C
45
12.
2/3 de 6000
A
400
B
4000
C
40
13.
10 x 10 x 10 x 10=
A
1,000
B
100,000
C
10,000
14.
8 x 6 + ____= 55
A
6
B
7
C
9
15.
El doble de 1500
A
3000
B
2500
C
3500