Question

dau coroană!!:verificati daca au loc egalitatile: a)5+5×{5+5×[5+5×(5+5×5)]}=390. b)6000-[2400:(67+53)+21×(2+3×50)]:4=220. c)15+10[325+10×(24+24:4)]=6265. d)[+15×2-5)×7+25:4-1600:32=0. e)12×[2+5×(384:4-36:6)-12×5×3]-3000=254. f)35+[72:8+144:12-3×(156:4-4×9)]:4=39. plz, dau coroană

Answer 1

a) 5+5×{5+5×[5+5×(5+5×5)]}=390.
5+5*{5+5*[5+5*(5+25) = 390
5+5*[5+5*(5+5*25)]= 390
5+5*[ 5+5*(5+125)] = 390
5+5*(5+5*130)= 390
5+5*(5+650) = 390
5+5*655= 390
5+3275= 390
3280≠ 390

b)6000-[2400:(67+53)+21×(2+3×50)]:4=220.
6000 -[ 2400:(67+53)+21*(2+150) ] :4= 220
6000-(2400 :120+21*152):4= 220
6000-( 20+3192) :4 = 220
6000- 3212:4 = 220
6000-803 = 220
5197≠ 220

c)15+10[325+10×(24+24:4)]=6265.
15+10*[ 325+10* ( 24 + 6)] =6265
15+10*(325+10*30) = 6265
15+10*(325+300) = 6265
15+10*625 = 6265
15+6250= 6265
6265 = 6265

d)[+15×2-5)×7+25:4-1600:32=0.
(30-5) *7+25:4-1600;32= 0
25*7+ 25:4-1600;32= 0
15 +6,25 -30= 0
21,25-30 = 0
8,75≠ 0

e)12×[2+5×(384:4-36:6)-12×5×3]-3000=254.
12*[ 2+5*(96-6)-12*5*3]-3000=254
12*(2+5*90-12*5*3)-3000= 254
12*(2+450- 180)-3000= 254
12*272-3000= 254
3264-3000= 254
264≠ 254

f)35+[72:8+144:12-3×(156:4-4×9)]:4=39
35+[ 72:8+144:12-3*(39-36)] :4= 39
35+(72:8+144:12-3*3):4=. 39
35+(9+ 12-9) :4= 39
35+12 :4 = 39
35+ 3= 39
38≠39