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194 - 24 : (12 : 3 x x -3) -25 = 145
194 - 24 : (4 x x -3) -25 = 145
24 : (4 x x -3) = 194 - 145 + 25
24 : (4 x x -3) = 24
4 x x -3 = 24 : 24
4 x x -3 = 1
4 \(\times\)x = 1 + 3
4 \(\times\)x = 4
x = 4 : 4
x = 1
`194 - 24 : (12 : 3 x xx -3) -25 = 145`
`24 : (4 xx x-3) = 194-(145+25)`
`24 : (4 xx x-3) = 24`
`4 xx x -3 = 1`
`4 xx x=1+3`
`4 xx x=4`
`x=4:4`
`x=1`.
B)
194−24:(12:3×x−3)−25=145
⇔194−24:(4×x−3)=145+25
⇔194−24:(4×x−3)=170
⇔24:(4×x−3)=194−170
⇔24:(4×x−3)=24
⇔4×x−3=24:24
⇔4×x−3=1
⇔4×x=1+3
⇔4×x=4
⇔x=4:4
⇔x=1
Vậyx=1
Trả lời:
\(194-24\div\left(44x-3\right)-25=145\)
\(\Leftrightarrow194-24\div\left(44x-3\right)=170\)
\(\Leftrightarrow24\div\left(44x-3\right)=24\)
\(\Leftrightarrow44x-3=1\)
\(\Leftrightarrow44x=4\)
\(\Leftrightarrow x=\frac{1}{11}\)
Vậy \(x=\frac{1}{11}\)
\(x\times\frac{1}{3}\div\frac{2}{9}-x\div5=1\frac{2}{5}\)
\(\Leftrightarrow x\times\frac{1}{3}\times\frac{9}{2}-x\times\frac{1}{5}=\frac{7}{5}\)
\(\Leftrightarrow x\times\frac{3}{2}-x\times\frac{1}{5}=\frac{7}{5}\)
\(\Leftrightarrow x\times\left(\frac{3}{2}-\frac{1}{5}\right)=\frac{7}{5}\)
\(\Leftrightarrow x\times\frac{13}{10}=\frac{7}{5}\)
\(\Leftrightarrow x=\frac{14}{13}\)
Vậy \(x=\frac{14}{13}\)
a,43.27 + 93.43+ 57.61 + 59.57
=43.(27+93)+57.(61+59)
=43.120+57.120
=(43+57).120
=100.120
=12000
b,16.41 + 37.34 + 11.41 + 25.37
=41.(16+11)+37.(34+25)
=41.27+37.59
=1107+2183
=3290
c,23.39 + 58.35 + 25.39 +26.58
=(23+25).39+58.(35+26)
=48.39+58.61
=1872+3538
=5410
d,36.6 + 6.37 + 31.73 + 73.23
=(37+36).6 + (31+23).73
=73.6 + 54.73
=73.(6+54)
=73.60
=133
**** nhes
e,64.6 + 81.4 + 17.6
a,43.27 + 93.43+ 57.61 + 59.57
=43.(27+93)+57.(61+59)
=43.120+57.120
=(43+57).120
=100.120
=12000
b,16.41 + 37.34 + 11.41 + 25.37
=41.(16+11)+37.(34+25)
=41.27+37.59
=1107+2183
=3290
c,23.39 + 58.35 + 25.39 +26.58
=(23+25).39+58.(35+26)
=48.39+58.61
=1872+3538
=5410
d,36.6 + 6.37 + 31.73 + 73.23
=(37+36).6 + (31+23).73
=73.6 + 54.73
=73.(6+54)
=73.60
=133
a: =9 giờ 37 phút
b: =8 phút 13 giây
c: =6 phút 3 giây
d: =60 phút 125 giây
=62 phút 5 giây
194 - 24 : ( 12 : 3 . x - 3 ) - 25 = 145
194 - 24 : ( 4 . x - 3 ) - 25 = 145
194 - 24 : ( 4 . x - 3 ) = 145 + 25
194 - 24 : ( 4 . x - 3 ) = 170
24 : ( 4 . x - 3 ) = 194 - 170
24 : ( 4 . x - 3 ) = 24
4 . x - 3 = 24 : 24
4 . x - 3 = 1
4 . x = 1 + 3
4 . x = 4
x = 4 : 4
x = 1
- Hok t -
194 - 24 : ( 12 : 3 . x - 3 ) - 25 = 145
194 - 24 : ( 12 : 3 . x - 3) = 145 + 25
194 - 24 : ( 12 : 3 . x - 3 ) = 170
24 : ( 12 : 3 . x - 3 ) = 194 - 170
24 : ( 12 : 3 . x - 3 ) = 24
12 : 3 . x - 3 = 24 : 24
12 : 3 . x - 3 = 1
12 : 3 . x = 1 + 3
12 : 3 . x = 4
3 . x = 12 : 4
3 . x = 3
x = 3 : 3
x = 1
-HT-