\(20,15\times0,125+0,875\times20,15-20,15\\ =20,15\times\left(0,125+0,875-1\right)\\ =20,15\times0\\ =0\)

= 15x 4 + 15 x 96

= 15x (4+96)

= 15x 100

=1500

15: 0,25+ 15 x 96 

15 x 4 + 15 x 96

15 x (4 + 96)

15 x 100

1500

20,15 x 96 + 20,15 :0,25

= 20,15 x 96 + 20,15 x 4

= 20,15 x ( 96 + 4 ) 

= 20,15 x 100

= 2015

20,15 x 96 + 20,15 : 0,25

= 20,15 x 96 + 20,15 x 4

= 20,15 x ( 96 + 4 )

= 20,15 x 100

= 2015

ok bạn phong nha

\(=\frac{1}{4}x\frac{1}{8}x3x4x8x\frac{1}{3}=1\)

Viết lại, ta có :

\(\frac{0,25\times96\times0,25\times1}{3}\)

\(=\frac{0,25\times4\times0,125\times8\times1\times3}{3}\)( Tách \(96=4\times8\times3\))

\(=\frac{1\times1\times3}{3}\)

\(=\frac{3}{3}=1\)

bang 1

\(A=\frac{\frac{1}{3}-0,25+\frac{1}{5}}{\frac{7}{6}-0,875+0,7}\)

\(=\frac{\frac{1}{3}-\frac{1}{4}+\frac{1}{5}}{\frac{7}{6}-\frac{7}{8}+\frac{7}{10}}\)

\(=\frac{2\left(\frac{1}{6}-\frac{1}{8}+\frac{1}{10}\right)}{7\left(\frac{1}{6}-\frac{1}{8}+\frac{1}{10}\right)}\)

\(=\frac{2}{7}\)

TRên tử : đưa 2 ra ngoài

Dưới mẫu: đưa 7 ra

=> A = 2/7

a)3,725x(96,28+3,72)=3,725x100=372,5

b)0,75+0,5+0,875+0,5+0,25+0,125

=(0,75+0,25)+(0,5+0,5)+(0,875+0,125)=1+1+1=3

96,28  x  3,725  +  3,725  x  3,72

= 3,725  x  (96,28  +  3,72)

= 3,725  x  100

= 372,5

0,75  +  0,5  +  0,875  + 1/2  + 25%  + 1/8

= (0,75   +  25%)  +  (0,5  +  1/2)  +  (0,875  +  1/8)

= 1  +  1  +  1

= 3

20,15x96+20,15:0,25=20,15x96+20,15x4

                                =20,15x(96+4)

                                   =20,15x100

                             =2015

= 20,15 x 96 + 20,15 x 4

= 20,15 x ( 96 + 4)

= 20,15 x 100

= 2015

20,15 x 96 + 20,15 : 0,25

= 20,15 x 96 + 20,15 x 4

= 20,15 x ( 96 + 4 )

= 20,15 x 100

= 2015

\(0,875-0,15+0,25-0,85-0,125+0,6+0,4+0,123\)

\(=\left(0,875-0,125+0,25\right)-\left(0,85+0,15\right)+\left(0,6+0,4\right)+0,123\)

\(=1-1+1+0,123\)

\(=1+0,123=1,123\)