5,4 * <127,5 -62,7>
<17,04 + 9,06 > : 7,25
tính nhanh
a) 7,25 x 6,93 + 7,25 x 2,07 + 7,25
b) 24,8 : 0,5 + 24,8 x 8
a) 7,25×6,93+7,25×2,07+7,25×1
=7,25×(6,93+2,07+1)
=7,25×10
=72,5
b) 24,8:0,5+24,8×8
=24,8×2+24,8×8
=24,8×(2+8)
=24,8×10
=248
Tính nhanh :
7,25 x 6,93 - 7,25 x 1,93
Giúp mình với các bạn ơi !
=7,25*\(\left(6,93-1,93\right)\)
=7,25*5
=3625
7,25*207
(-7,25)+12,5-2,75
\(=-\left(7,25+2,75\right)+12,5=-10+12,5=2,5\)
20,49 + x = 7,25 x 6,28
Gấppppppppppppppppp20,49 + x = 7,25 x 6,28
20,49 + x = 45,53
x = 45,53 - 20,49
x = 25,04
7,25 x (X + 56 ) = 58
7,25 x (X + 56 ) = 58
x + 56 = 58 : 7,25
x + 56 = 8
x = 8 - 56
x = -48
\(\left(25\%\cdot x-7,25\right)+4,25=10\)
=>\(x\cdot0,25-3=10\)
=>\(x\cdot0,25=13\)
=>\(x=\dfrac{13}{0,25}=52\)
`x xx7,25 + x xx 7,25=120`
`x+(7,25+7,25)=120`
`x+14,5=120`
`x=120-14,5`
`x=105,5`
`x xx7,25+x xx7,25=120->x xx 7,25+x xx 2,75=120`
`x xx 7,25+x xx 2,75=120`
`x xx(7,25+2,75)=120`
`x xx 10=120`
`x=120:10`
`x=12`
`x xx 7,25 + x xx 7,25 = 120`
`x xx (7,25 +7,25)=120`
`x xx 14,5=120`
`x=120:14,5`
`x=240/29`
X x 7,25+2,75x89=149,87x5
X x 7,25 + 244,75=749,35
X x 7,25=749,25 - 244,75
X x 7,25=504,5
X=504,5 : 7,25
X=69,5862069
X x 7,25 + 2,75 x 89 = 149,87 x 5
X x 7,25 + 2,75 x 89 = 749,35
X x 7,25 + 2,75 = 749,35 : 89
X x 7,25 + 2,75 = 8,41
X x 7,25 = 8,41 - 2,75
X x 7,25 = 5,66
X = 5,66 : 7,25
X = 0,78
Vậy X = 0,78
x . 7 , 25 + 2 , 75 . 89 = 149 , 87 . 5
x . 7 , 25 + 244 , 75 = 749 , 35
x . 7, 25 = 749 , 35 - 244 , 75
x . 7 , 25 = 504 , 6
x = 504 , 6 : 7 , 25
x = 69 , 6
dấu . là dấu x đó