=15,3x(3,4+2,3)+5,7x5,3
=15,3x5,7+5,7x5,3
=5,7x(15,3+5,3)
=5,7x20,6a

=.......

=15,3 x (3,4 + 2,3 ) - 5,7 x 5,3 

= 15,3 x 5,7 - 5,7 x 5,3 

= 5,7 x ( 15,3 - 5,3 )

= 5,7 x 10 

=57

58*11-5800*0.01-580
=58*11-5800*1/100-58*10
=58*11-58-58*10
=0

    58 \(\times\) 11 - 5800 \(\times\) 0,01 - 580

=  58 \(\times\) 11 - 58 - 58 \(\times\) 10

= 58 \(\times\) ( 11 - 1 - 10)

= 58 \(\times\) ( 10 - 10)

= 58 \(\times\) 0

= 0

\(=\dfrac{5,7\times16,2+16,2\times3,7-6,2\times4,6}{13,4+12,3+11,2-10,4-11,5-12,6-0,4}\)

\(=\dfrac{16,2\times\left(5,7+3,7\right)-6,2\times\left(4,8+4,6\right)}{\left(13,4-0,4\right)+\left(12,3+11,2-11,5\right)-\left(10,4+12,6\right)}\)

\(=\dfrac{16,2\times9,4-6,2\times9,4}{13+12-23}\)

\(=\dfrac{152,58-58,28}{2}\)

\(=\dfrac{94}{2}\)

\(=47\)

Help meeee !

Tính tổng của phép tính sau :

( 3/4 + 3/28 + 3/70 + 3/130 + 3/208 ) = ?

Hỡi các thiên tài toán học, hãy giúp mình lần này !

                                                                                Trân trọng cảm ơn !

=16,2 x ( 5,7  + 3,7 ) - 6,2 x ( 4,8 + 4,6 ) / ( 13,4 - 0,4 ) + ( 12,3 + 11,2 - 11,5 ) - ( 10,4 + 12,6)

=16,2 x 9,4 - 6,2 x 9,4 / 13 +  12 - 23

=152,28 - 58,28 / 2

= 94/2

=47

\(\frac{5,7\times16,2+16,2\times3,7-6,2\times4,8-6,2\times4,6}{13,4+12,3+11,2-10,4-11,5-12,6-0,4}\)

=\(\frac{16,2\times\left(5,7+3,7\right)-6,2\times\left(4,8+4,6\right)}{\left(13,4-0,4\right)+\left(12,3+11,2-11,5\right)-\left(10,4+12,6\right)}\)

=\(\frac{16,2\times9,4-6,2\times9,4}{13+\left(23,5-11,5\right)-23}\)

=\(\frac{9,4\times\left(16,2-6,2\right)}{13+12-23}\)

=\(\frac{9,4\times10}{2}\)

=\(\frac{94}{2}\)

=47

6688776555689233344566759897897987878886675657564435435324324324

ai giúp mình với ! mình đang cần gấp.

đáp án =94 nha

cho minh hoi sao ra 94 vay ban ?

\(=\dfrac{16.2\cdot9.4-7.8\cdot9.4}{2,4}=\dfrac{8.4\cdot9,4}{2,4}=32.9\)

12.3 + 4 x 12.3 + 12.3 x 5 - 1.23 x 99

= 12.3 + 4 x 12.3 + 12.3 x 5 - 12.3 x 9.9

= 12.3x ( 1 + 4 + 5 - 9.9 )

= 12.3 x 0.1

= 1.23

-1094,7

= 12,3 + 49,2 + 61,5 - 121.77

=1,23

5.7*16.2+16.2*4.3-6.2*4.8+6.2*5.2=(5.7*16.2+16.2*4.3)-(6.2*4.8+6.2*5.2)=16.2(5.7+4.3)-6.2(4.8+5.2)=16.2*10+6.2*10=10(16.2-6.2)=10

13.4+12.3+11.2+10.4-11.5-12.6-0.4=(13.4+12.3+11.2+10.4)-(11.5+12.6+0.4)=47.3-24.5=22.8

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