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Calcul mental
Calcul mental
przez HERA
10 zagadnienia
1.
4 + 15 + ... = 20
a
1
b
3
c
2
d
-1
2.
-3 + ... + 6 = 13
a
9
b
10
c
2
d
5
3.
(4+5) : 3 =
a
4
b
1
c
2
d
3
4.
(9 + 12 - 14 + 20) x 2 =
a
3
b
54
c
30
d
27
5.
3 + 17 - 6 + 4 =
a
18
b
17
c
16
d
13
6.
(4 x 7) + 32 - 40 =
a
16
b
18
c
20
d
30
7.
80/2 + 23 - 70 =
a
-7
b
15
c
8
d
-2
8.
46 - 13 + 12 - 14 + 18 - 26 =
a
13
b
23
c
18
d
-16
9.
32 + 24 + 50 + ... = -75
a
-14
b
1
c
-181
d
82
10.
14 - 20 + ... - 53 = 13
a
6
b
72
c
12
d
13
1:a
2:b
3:d
4:b
5:a
6:c
7:a
8:b
9:c
10:b
