14 x 230 + 7 x 540 =(230 x 7)+(540 x 14)

=1510+6560

=8070.

75460

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14 x 230 + 7 x 540 = 3220 + 3780

                            = (300+220)+(300+780)

                            = (3000+3000)+(220+780)

                            = 6000+1000= 7000

\(5,4\times36,8+1,8\times52,2\times3+0,01\times11\times540\)

\(=5,4\times36,8+5,4\times52,2+\left(0,01\times540\right)\times11\)

\(=5,4\times\left(36,8+52,2\right)+5,4\times11\)

\(=5,4\times89+5,4\times11\)

\(=5,4\times\left(89+11\right)\)

\(=5,4\times100=540\)

chúc e học tốt

540 là answer nha

\(=5,4\times36,8+5,4\times52,2+\left(0,01\times540\right)\times11\)

\(=5,4\times\left(36,8+52,2\right)+5,4\times11\) 

\(=5,4\times8,9+5,4\times11\)

\(=5,4\times\left(8,9+11\right)\)

\(=5,4\times100\)

\(=540\)

/ Mik ko chép đề bài đâu nhé! Hc tốt /

5,4 x 36,8 +1,8 x 52,2 x 3 + 0,01 x 11 x 540 

= 5,4 x 36,8 + 1,8 x 3 x 52,2 + 0,01 x 540 x11

= 5,4 x 36,8 + 5,4 x 52,2 + 5,4 x 11

= 5,4 x ( 36,8 + 52,2 + 11 )

= 5,4 x 100 

= 540 

đcm ghê thật lên đây để hỏi vào cả ních mình :)))

\(\frac{1}{2}\cdot\frac{18}{14}+\frac{1}{2}\cdot\frac{3}{14}-\frac{1}{2}\cdot\frac{7}{14}\)

\(=\frac{1}{2}\left(\frac{18}{14}+\frac{3}{14}-\frac{7}{14}\right)\)

\(=\frac{1}{2}\cdot1=\frac{1}{2}\)

5/14*7/13*26/25

=7/14*5/25*26/13

=1/2*1/5*2

=1/5

5/14\(\times\)7/13\(\times\)26/25

=\(\frac{5\times7\times26}{14\times13\times25}\)(rút gọn)

=1/5

`4/5 xx 3/7 + 4/5 xx 6/7 - 4/5 xx 4/14`

`= 4/5 xx ( 3/7 + 6/7-4/14)`

`= 4/5 xx 1`

`= 4/5`

30x25x7x8

=(30x7)x(25x8)

=210x200

=42000

75x8x12x14

=(75x12)x(8x14)

=900x112

=100800

A) =(30*7)*(25*8)

=210*200

=4200 

B)=(75*8)*(12*14)

=600*168
=100800

\(\dfrac{4}{5}\times\dfrac{3}{7}\times\dfrac{4}{5}\times\dfrac{6}{7}\times\dfrac{4}{14}=\dfrac{4}{5}\times\dfrac{3}{7}+\dfrac{4}{5}\times\dfrac{6}{7}-\dfrac{4}{5}\times\dfrac{2}{7}=\dfrac{4}{5}\times\left(\dfrac{6}{7}+\dfrac{3}{7}-\dfrac{2}{7}\right)=\dfrac{4}{5}\)