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`@` `\text {Ans}`
`\downarrow`
`a)`
`x \div ( 8,4 + 16,6 ) = 1,8 \times 3`
`x \div 25 = 5,4`
`x = 5,4 \times 25`
`x = 135`
Vậy, `x = 135.`
`b)`
`x \div ( 91,5 - 83,6) = 45`
`x \div 7,9 = 45`
`x = 45 \times 7,9`
`x = 355,5`
Vậy, `x = 355,5`
`c)`
`x \div ( 34 - 24,7) = 207`
`x \div 9,3 = 207`
`x = 207 \times 9,3`
`x =1925,1`
Vậy, `x = 1925,1.`
Tìm x:
a) \(x:\left(8,4+16,6\right)=1,8\times3\)
\(x:\left(8,4+16,6\right)=5,4\)
\(x:25=5,4\)
\(x=5,4\times25\)
\(x=135\)
b) \(x:\left(91,5-83,6\right)=45\)
\(x:7,9=45\)
\(x=45\times7,9\)
\(x=355,5\)
c) \(x:\left(34-24,7\right)=207\)
\(x:9,3=107\)
\(x=107\times9,3\)
\(x=995,1\)
Điền vào chỗ chấm:
96,15<...<101,12
_Nếu có đk là N thì KQ : 97 , 98 , 99 , 100 , 101
_TH còn lại : 96 ,16 ; ... ; 101,11
\(A=\frac{18\times123+9\times567\times2+3\times310\times6}{25\times1,8\times4}\)
\(A=\frac{18\times123+9\times2\times567+3\times6\times310}{25\times4\times1,8}\)
\(A=\frac{18\times123+18\times567+18\times310}{100\times1,8}\)
\(A=\frac{18\times\left(123+567+310\right)}{180}\)
\(A=\frac{18\times1000}{180}\)
\(A=\frac{18000}{180}\)
\(A=100\)
X x 3,6 : 0,9 = 0,17
X x 3,6 = 0,17 x 0,9
X x 3,6 = 0,153
X = 0,153 : 3,6
X = 0,0425
`@` `\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: 35,6*x=163,76
=>x=163,76:35,6=4,6
b: 56,89-x=48,263
=>x=56,89-48,263=8,627
c: x*100=324,6
=>x=324,6/100=3,246
d: x-51,6=20,78
=>x=20,78+51,6=72,38
\(4832-51,6\times8,4:1,8+25,9\)
\(=4832-433,44:1,8+25,9\)
\(=4832-240,8+25,9\)
\(=4617,1\)
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