a) 7.3x8.3+3.8x7.3-5x7.3x0.4

=7.3x(8.3+3.8-5x0.4)

=7.3x10.1

=73.73

b)\(\frac{1}{10}:0.1-\frac{1}{8}:0.125+\frac{1}{2}:0.5-\frac{1}{4}:0.25\)

=1-1+1-1=0

c)\(\left(\frac{2727}{3636}+\frac{1212}{5454}\right)\times\left(\frac{9}{70}\right)=\left(\frac{3}{4}+\frac{2}{9}\right)\times\left(\frac{9}{70}\right)\)

=\(\frac{35}{36}\times\frac{9}{70}\)=\(\frac{1}{8}\)

d) 120x999+\(\frac{120}{5\times2.5\times125\times4\times0.8}\)

=120x999+\(\frac{120}{5000}\)

=120x999+\(\frac{3}{125}\)

=119880.024

a 73,73

b1/8

c 119880,024

đúng nha 

k mình nha mn

sai câu d thì phải

\(\dfrac{1}{2}:0,5-\dfrac{1}{4}:0,25+\dfrac{1}{5}:0,2-\dfrac{1}{8}:0,125\)

\(=\dfrac{1}{2}\times2-\dfrac{1}{4}\times4+\dfrac{1}{5}\times5-\dfrac{1}{8}\times8\)

\(=1-1+1-1=0\)

\(2x-\frac{4.36}{0.125}=0.15\times42.9-11.7\times0,25\times0.8\)

\(2x-\frac{872}{25}=\frac{819}{200}\)

\(2x=\frac{819}{200}+\frac{872}{25}=\frac{1559}{40}\)

\(x=\frac{1559}{40}\times\frac{1}{2}=\frac{1559}{80}\)

A = \(\dfrac{1}{2}\): 5 + \(\dfrac{1}{4}\): 0,25 + \(\dfrac{1}{8}\): 0,125

A = \(\dfrac{1}{2}\) \(\times\) \(\dfrac{1}{5}\) + \(\dfrac{1}{4}\) \(\times\) 4 + \(\dfrac{1}{8}\) \(\times\) 8

A = \(\dfrac{1}{10}\) + 1 + 1

A = 0,1 + 2

A = 2,1

nhầm laf 1/2 : 5 + 1/4 : 0,25 + 1/8 : 0,125

\(-\frac{5}{16}:0,125+1,456:\frac{7}{25}-4\frac{1}{2}\cdot0,8\)

= \(-2,5+5,2-3,6\)

= -0,9

Bạn có thể trình bày rõ hơn ko

a) 4

b) 80

c) 243

d) 9

bạn tự giải ra nhé!mk làm tắt thui

5/16 : 0,125 + 1,456 : 7/26 +4 1/2 x 0,8 = 6,108

Câu 1.0,5+0,5=1

Câu 2.0,25+0,25=0,5

Câu 3.0,125+0,125=0,25

Câu 4.0,0625+0,0625=0,125

Câu 5.15,39+25,5=40,89

1.=1

2.=0,5

3.=0,25

4.=0,125

5.=4089.

câu 1 ; 1

câu 2: 0,5

câu 3;0.25

câu 4 : 0.125

câu 5 :40,89