Răspuns:
Explicație pas cu pas:
a) (18 + 2 x 7): (12:2 +8:4)
(18+14):(6+2)
32:8=4
21-24:3x (72:9-2x3): 4x5
21-24:3x (8-6): 4x5
21-24:3x2: 4x5
21-8x2: 4x5
21-16: 4x5
21-4x5
21-20
1
26.6+ 4x2x5-(20 - 12:3)
26.6+ 4x2x5-(20 - 12:3)
156+40-(20-4)
156+40-16
180
d) 42:7 + (6 + 6): 2-24: (5+3)
7+ 12: 2-24: 8
7+6-3
13-3=
10
e) (25 + 20):5-(19 + 5):8
45:5-24:8
9-3=6
f) 10 + (10:10 + 10) - (10 x 1 + 10)
10 + (1 + 10) - (10 + 10)
10 +11 - 20=
21-20=
1
