Question

9. Calculează:
a) (420 : 2 + 160 : 8) - 160: 5;
(660 : 6 + 66 : 6)-(7 x 3 + 2):
800 : 8 + (560 - 640 : 2);
(752 +248 + 80): 9 + 440 : 4,
811 - 11 * 11:11 +48 : 2 10;
(12 + 12 x 8 + 12:4) X (120 - 23x5);
b) 524 - (12 x 9+135) - 142,
856 - (135) - (615 + 25 10),
(21 5 4 45) - (1242-101/2):
32:8 + 15 18 146 124 (1230 - 10
(147+102/3 - 250): (144-100 - 13
(50:5 + 205 420 : 2) (1234:2-538​

Answer 1

Răspuns:

210+20)-32= 230-32=198

(110+11)-23=121-23=98

100+(560-320)=100+240=340

1080÷9+110=120-110=10