Question

Thực hiện phép tính:

a) 25 x { 8 x [12 -4 + 8 (16 : 80) ] }

b) 2016 x 0 + 1 (207 + 0 : 4579)

c) 15 x { 2100 : [ 254 - (16 +84 x 2) ] }

Answer 1

\(25\cdot\left\{8\cdot\left[12-4+8\left(16\div80\right)\right]\right\}\)

\(=25\cdot\left\{8\cdot\left[12-4+8\cdot0,2\right]\right\}\)

\(=25\cdot\left\{8\cdot8+1,6\right\}\)

\(=25\cdot\left(64+1,6\right)\)

\(=25\cdot65,6=1640\)

b)\(2016\cdot0+1\left(207+\frac{0}{4579}\right)=0+1\cdot207=207\)

c)\(15\cdot\left\{2100\div\left[251-\left(16+84\cdot2\right)\right]\right\}\)

\(=15\cdot\left\{2100\div\left[251-\left(16+168\right)\right]\right\}\)

\(=15\cdot\left\{2100\div\left[251-184\right]\right\}\)

\(=15\cdot\left(2100\div67\right)\)

\(=15\cdot\frac{2100}{67}=\frac{31500}{67}\)