4. Rezolvă in caiet:
a.b:9:7 = 4
b.cx4 x 8 = 64
C (d+50) x 4 = 240
d. (e - 300) x 6 = 102
e 12 x 5 x (f-6) 89 = 0
f. 36: g - 4+ h : 5 = 0
g. (a: 5-4): 3 - 260 : 2 = 1
h. (a x 2 - 40) : 23 = 12
1. 100 - 2 x 2 x 8 - (35 : a + 15) : 4 = 63 {[(a + 240 : 3) x 5 + 100] : 600 =
K 11 x 3 x [3 + 4x (15 + 6 x a) : 18] = 27 1. {[(7 - 3) x 5 - 2 + 3] : 7 + 9): a = 4
m. 10 x {a - 10 x [362 + 10 x (24 + 24:3)]) = 100
N. {[(2 + a) x 2 + 2] x 2 + 2} x 2 + 2 = 100: 2 + 2 x 2
P. [(65 - 38) : 9 + 16 : 8] x 8
= 1
[21 + 3 x (a - 15:5)] : 4​