d. 18 + 54 : (6 + 3)
24
11 Calculează, respectând regulile învățate.
a. 12 * 10:4+ (190 - 30): 8+ (202:2+ 33 x 3): 100
b. (9* 7 + 7 8) x 4 - (404: 4 + 44:4): 2
c. 1000 - (250 : 2 + 25 x 3) x3 - (25 + 15 x 5) x 4
d. 23 x (157 - 24 x 6) - 477: 3 - (22 + 220:2)
e. 135 + 5 000 : (1385-385) + 3 < (40 +8:2)
f.36 +0:(125 25 - 25 x 25) + 33 x 3 - 33:33 + 33 : 3
g. 909 - 909 (102 - 909: 9+0:1) - 99 x (9x9:9-9)
h. 3 x (6 - 6:2) + 305:5+ (100:5+ 8 x 5 x 0): 5
i. 138 + (27:3 - 1) x2:8-2 x (100 - 195:15) x 2
î. 7 + 7:7 (7-7:7) ~ 7:7
j. (202:2+ 101 x 2):3-2 (2-2:2)
k. 36 + 8 x (100 - 47 - 53 +2 x 18):(13-36:9)
1. 1 000: (74 +26) + 100 x (8 + 2) - (2 x 286 + 2 x 214)
m. 425:(600 – 595) - (81:9 + 71 x 1) + (4 x 11 - 66:2)
n. 35 + 1 000: (15 x 25 - 25 x 25) + 3 < (40 +8:2)
0.550:10 + 20 x (81:9 +9) - 20:06 x 7 - 11 x 2)
p. 82 + 9 (5 x 5-5):(5 + 5 x 5-4x5): (9-81:9 +90 : 10)
q. 15 - 3* 6:(3x3x3:3+0:5) + 30:03:3+ 5)​