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\(=\dfrac{5,7\times16,2+16,2\times3,7-6,2\times4,6}{13,4+12,3+11,2-10,4-11,5-12,6-0,4}\)
\(=\dfrac{16,2\times\left(5,7+3,7\right)-6,2\times\left(4,8+4,6\right)}{\left(13,4-0,4\right)+\left(12,3+11,2-11,5\right)-\left(10,4+12,6\right)}\)
\(=\dfrac{16,2\times9,4-6,2\times9,4}{13+12-23}\)
\(=\dfrac{152,58-58,28}{2}\)
\(=\dfrac{94}{2}\)
\(=47\)
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
\(\frac{16,2.3,7+5,7.16,2-7,8.4,8-4,6.7,8}{11,2+12,3+13,4-12,6-11,5-10,4}\)
\(=\)\(\frac{16,2\left(3,7+5,7\right)-7,8\left(4,8-4,6\right)}{\left(11,2+12,3+13,4\right)-\left(12,6+11,5+10,4\right)}\)
\(=\)\(\frac{16,2.9-7,8.0,2}{36,9-34,5}\)
\(=\)\(\frac{145,8-1,56}{2,4}\)
\(=\)\(\frac{144,24}{2,4}\)
\(=\)\(60,1\)
\(\text{Học tốt!!!}\)
\(\frac{\text{5,7 x 16,2+ 16,2 x 3,7 - 6,2 x 4,6}}{\text{13,4 + 12,3+ 11,2 - 10,4 - 11,5 -12,6 - 0,4}}\)
\(=\frac{\text{16,2x(3,7+5,7)- 28,52}}{\text{13+0,4 + 12+0,3+ 11+0,2 - 10+0,4 - 11-0,5 -12-0,6 - 0,4}}\)
\(=\frac{\text{16,2x9,4- 28,52}}{\text{13+}\left(0,4-0,4\right)+\left(12-12\right)+\left(11-11\right)+0,2-0,6-0,5-0,4}\)
\(=\frac{152,28-28,52}{13,2-\left(0,4+0,5+0,6\right)}\)
\(=\frac{123,76}{13,2-1,5}=\frac{123,76}{11,7}\)
Làm lại nek:
\(\frac{\text{5,7 x 16,2+ 16,2 x 3,7 - 16,2 x 4,6}}{\text{13,4 + 12,3+ 11,2 - 10,4 - 11,5 -12,6 - 0,4}}\)
\(=\frac{16,2.\left(5,7+3,7-4,6\right)}{\text{13+0,4 + 12+0,3+ 11+0,2 - 10+0,4 - 11-0,5 -12-0,6 - 0,4}}\)
\(=\frac{16,2x4.8}{\text{13+}\left(0,4-0,4\right)+\left(12-12\right)+\left(11-11\right)+0,2-0,6-0,5-0,4}\)
\(=\frac{77,76}{13,2-\left(0,4+0,5+0,6\right)}\)
\(\frac{77,76}{13,2-1,5}=\frac{77,76}{11,7}\)
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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