(6,15 + 10,85) : 8 = ?
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`a)=45xx4xx2xx0,5`
`=180xx1=180`
`b)0,86xx8xx15xx1,25`
`=0,86xx15xx8xx1,25`
`=12,9xx10=129`
`c)=7,3xx(6,17+3,9)`
`=7,3xx10,07=73,511`
`d)=6,15xx(3/4+1/4)`
`=6,15xx1=6,15`
6,15 : 0,5 + 6,15 : 0,2 + 3 x 6,15
= 6,15 x 2 + 6,15 x 5 + 3 x 6,15
= 6,15 x ( 2 + 3 + 5 )
= 6,15 x 10
= 61,5
6,15 : 0,5 + 6,15 : 0,2 + 3 * 6,15
=6,15 (2+5+3)
=6,15 x(10)= 61,5
a) \(6,15:0,5+6,15:0,2+3x6,15\)
\(=6,15x\left(1:0,5+1:0,2+3\right)=6,15x\left(2+5+3\right)=6,15x10=61,5\)
b) \(0,215x74,24+25,76x0,215+18,5\)
\(=0,215x\left(74,24+25,76\right)+18,5=0,215x100+18,5=21,5+18,5=40\)
`@` `\text {Ans}`
`\downarrow`
`4,`
`a)`
\( 6,15 \div 0,5 + 6,15 \div 0,2 + 3 \times 6,15 \)
`= 6,15 \times 2 + 6,15 \times 5 + 3 \times 6,15`
`= 6,15 \times (2 + 5 + 3)`
`= 6,15 \times 10`
`= 61,5`
`b)`
`0,215 \times 74,24 + 25,76 \times 0,215 + 18,5 `
`= 0,215 \times (74,24 + 25,76) + 18,5`
`= 0,215 \times 100 + 18,5`
`= 21,5 + 18,5`
`=40`
\(6) 27,693 + 8,54 = 36,233\\ 7) (-81,73)-17,249 = -98,979\\ 8) 9,371.8,65 = 81,05915\\ 9) (-14,29).73,6 = -1051,744\\ 10) 24,108:6,15 = 3,92\\ 11) 324,82+ 312,25 = 637,07\\ 13) 8,446 : 4,12 = 2,05\\ 14) (-882):3,6 = -245\\15) 19,427.1,8 = 34,9686\)
\(\text{6) 27,693 + 8,54 = 36.233}\)
\(\text{7) (-81,73) - 17,249= -98.979}\)
\(\text{8) 9,371 . 8,65 = 81.05915}\)
\(\text{9) (-14,29) . 73,6 = -1051.744}\)
\(\text{10) 24,108 : 6,15= 3.92}\)
\(\text{11) 324,82 + 312,25= 637.07}\)
\(\text{13) 8,446 : 4,12= 2.05}\)
\(\text{14) (-882) : 3,6 = -245}\)
\(\text{15) 19,427 . 1,8 = 34.9686}\)
(6,15 + 10,85) : 8
=17:8
=2,125
bằng 2,125 nha bạn.