Question

1.Calculati respectand ordinea operatiilor:
134 x 16 +217 x13 =
104 x 3 - 173 x 2 =
172 x5 - 256 x 2 =
357 x 2 + 196 x 2 =

2. Aflati termenul necunoscut:
278 x 3 - a = 470
195 x8 + b = 2 450
c - ( 306 x 7 ) = 420
d + (315 x 8 ) = 12300

Answer 1

2144+2821=4965
312-346=-34
860-512=348
714+392=1106
834-a=470→a=834-470
a=364 1560+b=2450→b=2450-
-1560 b=890
c-2142=420→c=2142+420
c=2562
d+2520=12300→d=12300-
-2520. d=9780