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a: \(=393,24-376,2936=16,9464\)
b: \(=\dfrac{46}{15}-\dfrac{18}{5}=\dfrac{46}{15}-\dfrac{54}{15}=\dfrac{-8}{15}\)
a: =393,24−376,2936=16,9464=393,24−376,2936=16,9464
b: =4615−185=4615−5415=−815
a) \(2,8\times19,35-2,8\times19,35\)
\(=2,8\times\left(19,35-19,35\right)\)
\(=2,8\times0\)
\(=0\)
b) \(56,08\times93,23-56,08\times83,23\)
\(=56,08\times\left(93,23-83,23\right)\)
\(=56,08\times10\)
\(=560,8\)
c) \(1,3856\times194-1,3856\times94\)
\(=1,3856\times\left(194-94\right)\)
\(=1,3856\times100\)
\(=138,56\)
d) \(28,524\times3,8+28,524\times6,2\)
\(=28,524\times\left(6,2+3,8\right)\)
\(=28,524\times10\)
\(=285,24\)
c) \(101\times0,128-0,128\)
\(=0,128\times\left(101-1\right)\)
\(=0,128\times100\)
\(=12,8\)
a: =2.8*(19,35-19,35)=0
b: =56,08(93,23-83,23)
=10*56,08=560,8
c: =1,3856(194-94)
=1,3856*100
=138,56
d: =28,524*(3,8+6,2)
=28,524*10
=285,24
e: =0,128*100
=12,8
`@` `\text {Ans}`
`\downarrow`
`a,`
`93,57 \times 19,45 - 93,57 \times 9,45`
`= 93,57 \times (19,45 - 9,45)`
`= 93,57 \times 10`
`= 935,7`
`b,`
`815,5 \times 0,08 + 815,5 \times 0,02`
`= 815,5 \times (0,08 + 0,02)`
`= 815,5 \times 0,1`
`= 81,55`
`c,`
`11 \times 46,79 - 46,79`
`= 46,79 \times (11 - 1)`
`= 46,79 \times 10`
`= 467,9`
`d,`
`92,305 \times 108 - 92,305 \times 8`
`= 92,305 \times (108 - 8)`
`= 92,305 \times 100`
`= 9230,5`
`e,`
`189,28 \times 78 - 189,28 \times 68`
`= 189,28 \times (78 - 68)`
`= 189,28 \times 10`
`= 1892,8`
a) \(93,57\times19,45-93,57\times9,45\)
\(=93,57\times\left(19,45-9,45\right)\)
\(=93,57\times10\)
\(=935,7\)
b) \(815,5\times0,08+815,5\times0,02\)
\(=815,5\times\left(0,08+0,02\right)\)
\(=815,5\times0,1\)
\(=81,55\)
c) \(11\times46,72-46,79\)
\(=46,79\times\left(11-1\right)\)
\(=46,79\times10\)
\(=467,9\)
d) \(92,305\times108-92,305\times8\)
\(=92,305\times\left(108-8\right)\)
\(=92,305\times100\)
\(=9230,5\)
e) \(189,28\times78-189,28\times68\)
\(=189,28\times\left(78-68\right)\)
\(=189,28\times10\)
\(=1892,8\)
a)26,1<x<26,2
26,10<x<26,20
x=26,11 ;26,12; 26,13; 26,14; 16,15.
b)134,8<x<134,9
134,80<x<134,90
x=134,85; 134,86; 134,87; 134,88; 134,89.
chúc bạn học tốt
26,11; 26,12 ; 26,13; 26,14 ; 26; 15
134,82; 134,83 ; 134,84 ; 134,85; 134,86