Question

Efectuati:
a) 3,2×[2,6+4,25+3×(12,3+2,6²)]-3,8 la puterea 0;
b) 2,5³:2,5²+4,5×[12,8-0,5×(13,9-7,75)];
c) 2,54+(123,34²-12,3²) la puterea 0-1,08:2;
d) 3,5²-1,2×{11+1,1×[6,5+2×(0,45-0,4)]};
e) [0,8+4×(0,34×10+1,2:2)]:0,168.
Va rog din suflet sa mă ajutați, dau coroană!!!

Answer 1

a) 3,2x[2,6+4,25+3x(12,3+2,6²)]-3,8 la puterea 0=
3,2x[2,6+4,25+3x(12,3+6,76)]-3,8 la puterea 0=
3,2x[2,6+4,25+3x19,06]-3,8 la puterea 0=
3,2x[2,6+4,25+57,18]-3,8 la puterea 0=
3,2x[6,85+57,18]-3,8 la puterea 0=
3,2x64,03-1=
204,896-1=
203,896

2,5³:2,5²+4,5×[12,8-0,5×(13,9-7,75)]=
2,5³:2,5²+4,5×[12,8-0,5×13,4]=
2,5³:2,5²+4,5×[12,8-6,7]=
2,5³:2,5²+4,5×6,1=
15,625:2,5²+4,5×6,1=
15,625:6,25+4,5×6,1=
2,5+4,5×6,1=
2,5+27,45=
29,95

c) 2,54+(123,34²-12,3²) la puterea 0-1,08:2=
2,54+1-1,08:2=
2,54+1-0,54=
3,54-0,54=
3

d) 3,5²-1,2×{11+1,1×[6,5+2×(0,45-0,4)]}=
3,5²-1,2×{11+1,1×[6,5+2×0,05]}=
3,5²-1,2×{11+1,1×[6,5+0,1]}=
3,5²-1,2×{11+1,1×6,6]}=
3,5²-1,2×{11+7,26]}=
3,5²-1,2×18,26=
12,25-1,2×18,26=
12,25-21,912=
-9662

e) [0,8+4×(0,34×10+1,2:2)]:0,168=
[0,8+4×(34+1,2:2)]:0,168=
[0,8+4×(34+0,6)]:0,168=
[0,8+4×34,6]:0,168=
[0,8+138,4]:0,168=
139,2:0,168=
828,(571428)