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

=1 day 

\(\frac{16,2.3,7+5,7.16,2-7,8.4,8-4,6.7,8}{11,2+12,3+13,4-12,6-11,5-10,4}\)

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

\(=\)\(\frac{16,2.9-7,8.0,2}{36,9-34,5}\)

\(=\)\(\frac{145,8-1,56}{2,4}\)

\(=\)\(\frac{144,24}{2,4}\)

\(=\)\(60,1\)

\(\text{Học tốt!!!}\)

cảm ơn

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

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

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

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

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

\(=47\)

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 !

a) 16,2 x 3,7 +5,7 x 16,2 - 7,8 x4,8 - 4,6 x 7,8

=16 x (3,7+5,7) - 7,8 x (4,8 - 4,6)

=16 x 9,4 - 7,8 x 0,2

=150,4 - 1,56

=148,84

b)11,2 + 12,3 + 13,4 - 12,6 - 11,5 - 10,4

=23,5 + 13,4 - 12,6 - 11,5 - 10,4

=36,9 -12,6 - 11,5 - 10,4

=24,3 - 11,5 - 10,4

=12,8 - 10,4

=2,4

gạch chân _________________________ là phần nha

\(\frac{16,2x3,7+5,7x16,2-7,8x4,8-4,6x7,8}{11,2+12,3+13,4-12,6-11,5-10,4}\)

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

\(=\frac{16,2x9,4-7,8x9,4}{36,9-34,5}\)

\(=\frac{9,4x\left(16,2-7,8\right)}{2,4}=\frac{9,4x8,4}{2,4}=\frac{78,96}{2,4}=32,9\)

4659/25=186.36

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\(a)16,2.3,7+16,2.5,7-7,8.4,8-4,6.7,8\)

\(=16,2\left(3,7+5,7\right)-7,8\left(4,8-4,6\right)\)

\(=16,2.9,4-7,8.0,2\)

\(=152,28-1,56=150,72\)

\(b)11,2+12,3+13,4-12,6-11,5-10,4\)

\(=23,5+13,4-10,4-12,6-11,5\)

\(=23,5-11,5-23+13,4\)

\(=12-23+13,4=-11+13,4=2,4\)