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3,12 : 0,25 + 12,48 x 3 - 3,12 x 6
= 3,12 x 4 + 3,12 x ( 4 x 3 ) - 3,12 x 6
= 3,12 x 4 + 3,12 x 12 - 3,12 x 6
= 3,12 x ( 4 + 12 - 6 )
= 3,12 x 10
= 31,2
3,12 : 0,25 + 12,48 x 3 - 3,12 x 6
=3,12 : 1/4 + 3,12 x 4 x 3 - 3,12 x 6
=3,12 x 4 + 3,12 x 12 - 3,12 x 6
=3,12 x (4 + 12 - 6)
=3,12 x 10
=31,2
2 x 3,12 x 1,25 : 0,25 x 10
= 6,24 x 1,25 x 4 x 10
= 6,24 x 5 x 10
= 6,24 x 50
= 312
`3,12:0,25+3,12:0,2+3,12:0,5+3,12xx89`
`=3,12xx4+3,12xx5+3,12xx2+3,12xx89`
`=3,12xx(4+5+2+89)`
`=3,12xx100 = 312`
\(3,12:\dfrac{1}{4}+3,12:\dfrac{1}{5}+3,12:\dfrac{1}{2}+3,12\times89\)
\(=3,12\times4+3,12\times5+3,12\times2+3,12\times89\)
\(=3,12\times\left(4+5+2+89\right)\)
\(=3,12\times100=312\)
\(\frac{1}{7}\cdot\frac{2}{3}+\frac{5}{6}:\frac{3}{10}-\frac{2}{3}\cdot\frac{3}{7}\)
\(=\left(\frac{1}{7}\cdot\frac{2}{3}-\frac{2}{3}\cdot\frac{3}{7}\right)+\frac{5}{6}\cdot\frac{10}{3}\)
\(=\frac{2}{3}\cdot\left(-\frac{2}{7}\right)+\frac{5}{3}\cdot\frac{5}{3}\)
\(=-\frac{4}{21}+\frac{25}{6}=\frac{167}{42}\)
Xin lỗi không nhanh được
12 , 48 : 0 , 5 x 6 , 25 x 4 x 2 2 x 3 , 12 x 1 , 25 : 0 , 25 x 10 = 12 , 48 x 2 x 6 , 25 x 4 x 2 2 x 3 , 12 x 1 , 25 x 4 x 10 = 4 x 5 x 2 10 = 4
\(\frac{10}{7}\cdot\frac{2}{3}+\frac{5}{6}:\frac{3}{10}-\frac{2}{3}\cdot\frac{3}{7}\)
\(=\left(\frac{10}{7}\cdot\frac{2}{3}-\frac{2}{3}\cdot\frac{3}{7}\right)+\frac{5}{6}\cdot\frac{10}{3}\)
\(=\frac{2}{3}\left(\frac{10}{7}-\frac{3}{7}\right)+\frac{5\cdot10}{6\cdot3}\)
\(=\frac{2}{3}\cdot1+\frac{25}{9}\)
\(=\frac{2}{3}+\frac{25}{9}\)
\(=\frac{31}{9}\)
3.12:0.25+12.48*3-3.12*6
=3.12*4+3.12*12-3.12*6
=3.12*(4+12-6)
=3.12*10
=31.2
= 3,12 x 4 + 3,12 x 4 x 3 - 3,12 x 6
= 3,12 x 4 +3,12 x 12 - 3,12 x 6
= 3,12 x ( 4 + 12 - 6 )
= 3,12 x 10
= 31,2