Question

11. Efectuați:
a) 3/7-3/5-3/73-3/8-3/100: 3/23,
c) (9/24 +2•8/16: 9/8): 3/49;
b) (2³)/8 - (2/4)6 + 3².9² - 3/6;
d) (2/79+ 3 ∙ 2/76 + 27³ + 27): 4³. ​

Answer 1

Răspuns:

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)

Explicație pas cu pas:

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