Question

Calculati a) 15-5×2+8:4
B) [63:(1+2×2+4:2)-4×2]×7-5
c) 9×6-2×[(11+7×3):2³+3²]
D) {15×4+15×16-20×[(5²-3²+2³):8-2]}:10
Ajutati ma va rog frumos!!!​

Answer 1

Răspuns:

a) 15-10+2=5+2=7

b) [63:(1+4+2)-4×2]×7-5=(63:7-4×2)×7-5=(9-8)×7-5=1×7-5=7-5=2

c) 9×6-2×[(11+7×3):2³+3²]=54-2×[(11+21):8+9]=54-2×(32:8+9)=54-2×(4+9)=54-2×13=54-26=28

d) {15×4+15×16-20×[(25-9+8):8-2]}:10={60+240-20×[(16+8):8-2]}:10= [60+240-20×(24:8-2)]:10=[60+240-20×(3-2)]:10=(60+240-20×6):10=(60+240-120):10=(300-120):10=180:10=18

Coroana? (pls m-am chinuit mult :) )