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a. 2205 - (35 . 7)
= 2205 - 245
= 1960
b. 8700 : 25 . 4
= 348 . 4
= 1392
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a ) \(=\frac{35\cdot42}{5\cdot2}=\frac{7\cdot5\cdot2\cdot21}{5\cdot2}\)
\(=\frac{7\cdot21}{1}=147\)
b) \(=\frac{54\cdot35}{7\cdot9}\)
\(=\frac{6\cdot9\cdot7\cdot5}{7\cdot9}\)
\(=\frac{6\cdot5}{1}=30\)
![](https://rs.olm.vn/images/avt/0.png?1311)
9,3 x 6,7 + 9,3 x 3,3 = 9,3 x ( 6,7 + 3,3 )
= 9,3 x 10
= 93
7,8 x 0,35 + 0,35 x 2,2 = 0,35 x ( 7,8 + 2,2 )
= 0,35 x 10
= 3,5
Đáp án là:
a) 9,3 x 6,7 + 9,3 x 3,3
= 9,3 x (6,7+3,3)
= 9,3 x 10
= 93.
b) 7,8 x 0,35 + 0,35 x 2,2
= 0,35 x (7,8+2,2)
= 0,35 x 10
= 35
![](https://rs.olm.vn/images/avt/0.png?1311)
5634*37-125*34 = 204208
3332:(4*49)+436 = 453
2205:(35*7)+2568 = 2577
1995*253+8910:495 = 504753
ủng hộ mk nha!
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Cách 1:
7 11 : 3 5 + 4 11 : 3 5 = 7 11 + 4 11 : 3 5 = 11 11 : 3 5 = 1 : 3 5 = 5 3
Cách 2:
7 11 : 3 5 + 4 11 : 3 5 = 35 33 + 20 33 = 55 33 = 5 3
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`35 xx 34 + 35 xx 66 + 100 xx 7`
`= 35 xx ( 34+66) + 100 xx 7`
`= 35 xx 100 + 100 xx 7`
`= 3500 + 700`
`= 4200`
`35xx34+35xx66+100xx7`
`=35xx(34+66)+100xx7`
`=35xx100+100xx7`
`=100xx(35+7)`
`=100xx42`
`=4200`
![](https://rs.olm.vn/images/avt/0.png?1311)
\(5\dfrac{3}{4}:3+2\dfrac{1}{4}\times\dfrac{1}{3}-\dfrac{1}{8}=\left(5\dfrac{3}{4}+2\dfrac{1}{4}\right)\times\dfrac{1}{3}-\dfrac{1}{8}\\ =8\times\dfrac{1}{3}-\dfrac{1}{8}=\dfrac{8}{3}-\dfrac{1}{8}=\dfrac{61}{24}\\ ----\\ \dfrac{3}{5}:\dfrac{5}{6}:\dfrac{6}{7}:\dfrac{7}{8}+\dfrac{2}{5}+\dfrac{23}{35}\\ =\dfrac{3}{5}\times\dfrac{6}{5}\times\dfrac{7}{6}\times\dfrac{8}{7}+\dfrac{2}{5}+\dfrac{23}{35}=\dfrac{18}{25}\times\dfrac{4}{3}+\dfrac{2}{5}+\dfrac{23}{35}=\dfrac{353}{175}\)
c1:2205:(35.7)
=2205:245
=9
c2;2205.35:2205.7
=77175:15435
=5
c1:2205:(35.7) =2205:245=9 c2:2205:35:7=63:7=9 k cho mình