Thực hiện phép tính:
a) (38 + −34 + 712 ) : 56 + 12
b) 12 + 34 - (34 - 45 )
c) 6512 : 234 + 1114 . (13 - 15 )
d) (78 - 34 ) . 113 - 27 . (3,5)2
e) (35 + 0,415 - 3200 ) .223 . 0,25
f) 516 : 0,125 - (214 - 0,6) . 1011
g) 0,25 : (10,3 - 9,8) - 34
h) 11315 . 0,75 - (1120 + 25%) : 73
k) 23 +27 −114 −1−37 +328
\(a,\left(38+-34+712\right):56+12\)
\(=\left(4+712\right):56+12\)
\(=716:56+12\)
\(=\frac{179}{14}+12\)
\(=\frac{347}{14}\)
\(b,12+34-\left(34-45\right)\)
\(=12+34--11\)
\(=46--11\)
\(=57\)
\(c,6512:234+1114\cdot\left(13-15\right)\)
\(=6512:234+1114\cdot-2\)
\(=\frac{3256}{117}+-2228\)
\(=\frac{-257420}{117}\)
\(d,\left(78-34\right)\cdot113-27\cdot\left(3,5\right)^2\)
\(=44\cdot113-27\cdot\frac{49}{4}\)
\(=4972-\frac{1323}{4}\)
\(=\frac{18565}{4}\)
\(e,\left(35+0,415-3200\right)\cdot223\cdot0,25\)
\(=-3164,585\cdot223\cdot0,25\)
\(=-176425,6138\)
\(f,516:0,125-\left(214-0,6\right)\cdot1011\)
\(=516:0,125-213,4\cdot1011\)
\(=4128-215747,4\)
\(=-211619,4\)
\(g,0,25:\left(10,3-9,8\right)-34\)
\(=\frac{1}{4}:\frac{1}{2}-34\)
\(=\frac{1}{2}-34\)
\(=\frac{-67}{2}\)
\(h,11315\cdot0,75-\left(1120+25\%\right):73\)
\(=11315\cdot0,75-\frac{4481}{4}:73\)
\(=\frac{33945}{4}-\frac{4481}{292}\)
\(=\frac{618376}{73}\)
\(k,23+27-114-1-37+328\)
\(=50-114-1-37+328\)
\(=-64-1-37+328\)
\(=-65-37+328\)
\(=-102+328\)
\(=226\)
MK CHUC BAN HOC TOT :))