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13, 25 : 0, 5 + 13, 25 : 0, 25 + 13, 25 : 0, 125
= 13, 25 . 2 + 13, 25 . 4 + 13, 25 . 8
= 13, 25 . ( 2 + 4 + 8 )
= 13, 25 . 14
= 185, 5
a, 2 x 4 x 8 x 0,5 x 0,125 x 0,25 x ( 0,4321 + 0,5679 )
= ( 2 x 0,5 ) x ( 4 x 0,25 ) x ( 0,125 x 8 ) x ( 0,4321 + 0,5679 )
= 1 x 1 x 1 x ( 0,4321 + 0,5679 )
= 1 x ( 0,4321 + 0,5679 )
= 1 x 1 = 1
b, 3,7 x 3,8 + 8,3 x 3,7 - 0,4 x 3,7 x 5
= 3,7 x ( 3,8 + 8,3 ) - ( 0,4 x 5 ) x 3,7
= 3,7 x 12,1 - 2 x 3,7
= 3,7 x ( 12,1 - 2 )
= 3,7 x 10,1 = 37,37
12 , 35 : 0 , 5 + 12 , 35 : 0 , 25 + 12 , 35 : 0 , 125
= 12 , 35 x 2 + 12 , 35 x 4 + 12 , 35 x 8
= 12 , 35 x ( 2 + 8 ) + 12 , 35 x 4
= 12 , 35 x 10 + 49 , 4
= 123 , 5 + 49 , 4
= 172 , 9
Tk mk nha !!!
12,35 : 0,5 + 12,35 : 0,25 + 12,35 : 0,125 = 12,35 x 2 + 12,35 x 4 + 12,35 x 8
= 12,35 x ( 2 + 4 + 8 )
= 12,35 x 14
= 172,9
1/2 : 0.5 - 1/4 : 0.25 + 1/8 : 0.125 - 1/10 : 0. 1
= 1 - 1 + 1 - 1
= 0 + 0
= 0
\(\frac{1}{2}:0,5-\frac{1}{4}:0,25+\frac{1}{8}:0,125-\frac{1}{10}:0,1\)
\(=\frac{1}{2}:\frac{1}{2}-\frac{1}{4}:\frac{1}{4}+\frac{1}{8}:\frac{1}{8}-\frac{1}{10}:\frac{1}{10}\)
\(=1-1+1-1=0\)
\(\dfrac{1}{10}+\dfrac{1}{2}:0,5-\dfrac{1}{4}:0,25+\dfrac{1}{8}:0,125\)
\(=\dfrac{1}{10}+\dfrac{1}{2}\times2-\dfrac{1}{4}\times4+\dfrac{1}{8}\times8\)
\(=\dfrac{1}{10}+1-1+1\)
\(=\dfrac{1}{10}+1=\dfrac{1}{10}+\dfrac{10}{10}=\dfrac{11}{10}\)
\(\dfrac{1}{10}+\dfrac{1}{2}\div0,5-\dfrac{1}{4}\div0,25+\dfrac{1}{8}\div0,125\)
= 0,1 + 0,5 x 2 - 0,25 x 4 + 0,125 x 8
= 0,1 + 1 - 1 + 1
= 1,1 - 1 +1
= 0,1 + 1
= 1,1
`#3107.101107`
\(\dfrac{1}{10}+\dfrac{1}{2}\cdot0,5-\dfrac{1}{4}\div0,25+\dfrac{1}{8}\div0,125\)
\(=\dfrac{1}{10}+\left(\dfrac{1}{2}\div0,5\right)-\left[\left(\dfrac{1}{2}\right)^2\div\left(0,5\right)^2\right]+\left(\dfrac{1}{2}\right)^3\div\left(0,5\right)^3\)
\(=\dfrac{1}{10}+\left(\dfrac{1}{2}\div0,5\right)-\left(\dfrac{1}{2}\div0,5\right)^2+\left(\dfrac{1}{2}\div0,5\right)^3\)
\(=\dfrac{1}{10}+1-1^2+1^3\)
\(=\dfrac{1}{10}+1\)
\(=\dfrac{11}{10}\)
\(\dfrac{1}{10}\) + \(\dfrac{1}{2}\) : 0,5 - \(\dfrac{1}{4}\) : 0,25 + \(\dfrac{1}{8}\) : 0,125
= 0,1 + \(\dfrac{1}{2}\)x 2 - \(\dfrac{1}{4}\) x 4 + \(\dfrac{1}{8}\) x 8
= 0,1 + 1 - 1 + 1
= (0,1 + 1) + (1 - 1)
= 1,1
101+21:0,5−41:0,25+81:0,125
=110+12×2−14×4+18×8=101+21×2−41×4+81×8
=110+1−1+1=101+1−1+1
=110+1=110+1010=1110=101+1=101+1010=1011