Odpowiedź:
poziom C
a) 2 [7 - (3-1)] = 2 [7-2] =2 x 5 =10
b) 16: [2+8:(2+2)] = 16 : [ 2+8:4] = 16 : [2+2] = 16 :4 = 4
c) 3x [4+2 x (1+1)] = 3 x [ 4+2x2] = 3 x [4+4] = 3 x 8 = 24
d) 8 - [ 2x ( 5-1) - 3] = 8 - [2x4 - 3] =8 - [8-3] = 8-5 =3
e) 10 + 2 x [ 3 +2 : (1+1)] = 10 +2 [3 +2 :2] = 10+2 [3 +1] = 10 +2 x 4= 10 +8 =18
f) [ 2x (3-1)+6] :5 =[2 x 2 +6] :5 = [4+6] : 5=10: 5= 2
Szczegółowe wyjaśnienie:
