35 trừ (5 nhân x trừ 2) chia 6
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\(\left(5^2\times2^3-7^3\times2\right)\div2\times6-7\div2^5\)
\(=\left(25\times8-343\times2\right)\div2\times6-7\div32\)
\(=\left(200-686\right)\div2\times6-7\div32\)
\(=-486\div2\times6-7\div32\)
\(=-1458-0,21875\)
\(=-1458,21875\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(\frac{3}{2}-\frac{5}{6}:x=\frac{5}{15}-\frac{3}{15}\)
\(\Leftrightarrow\frac{3}{2}-\frac{5}{6}:x=\frac{2}{15}\)
\(\Leftrightarrow\frac{5}{6}:x=\frac{3}{2}-\frac{2}{15}\)
\(\Leftrightarrow\frac{5}{6}:x=\frac{41}{30}\)
\(\Leftrightarrow x=\frac{5}{6}:\frac{41}{30}\)
\(\Leftrightarrow x=\frac{25}{41}\)
b) \(x-\frac{6}{7}.\frac{14}{8}=\frac{1}{2}-\frac{2}{5}\)
\(\Leftrightarrow x-\frac{3}{2}=\frac{1}{10}\)
\(\Leftrightarrow x=\frac{1}{10}+\frac{3}{2}\)
\(\Leftrightarrow x=\frac{8}{5}\)
c) \(x:\frac{6}{5}+\frac{2}{3}=\frac{7}{3}\)
\(\Leftrightarrow x:\frac{6}{5}=\frac{7}{3}-\frac{2}{3}\)
\(\Leftrightarrow x:\frac{6}{5}=\frac{5}{3}\)
\(\Leftrightarrow x=\frac{5}{3}.\frac{6}{5}\)
\(\Leftrightarrow x=2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(5^2.2^3-7^3.2\right):\left(2.6-7:2^5\right)\\ =\left(25.8-343.2\right):\left(12-7:32\right)\\ =\left(200-686\right):\left(12-\dfrac{7}{32}\right)\\ =-486:\dfrac{377}{32}=-486.\dfrac{32}{377}=-\dfrac{15552}{377}\)
(5^2*2^3-7^3*2):2*6-7:2^5
=(25*8-343*2):3-7/32
=-162-7/32=-5191/32
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a.2^6.\left(x-2\right)=104\)
\(x-2=104:2^6\)
\(x-2=1,652\)
\(x=1,625+2\)
\(x=3,625\)
\(b.2\times4^{x+1}=128\)
\(4^{x+1}=128:2\)
\(4^{x+1}=64\)
\(4^{x+1}=4^3\)
\(\Rightarrow x+1=3\)
\(x=3-1\)
\(\Leftrightarrow x=3\)
\(c.227-5\left(x+8\right)=3^6:3^3\)
\(227-5\left(x+8\right)=3^3\)
\(227-5\left(x+8\right)=27\)
\(5\left(x+8\right)=227-27\)
\(5\left(x+8\right)=200\)
\(x+8=200:5\)
\(x+8=40\)
\(x=40-8\)
\(x=32\)
ủng hộ mk nha, chắc đúng đó
cả tháng nay ms online lại
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta đặt phép tính : \(y-6\div2\times\left(48-24\times2\div6-3\right)=0\) 0
\(y-3\times(48-8-3)=0\)
\(y-3\times37=0\)
\(y-111=0\)
\(y=0+111\)
\(y=111\)
y - 6 : 2(48 - 24. 2 : 6 - 3) = 0
y - 3(48 - 48 : 6 - 3) = 0
y - 3(48 - 8 - 3) = 0
y - 3(40 - 3) = 0
y - 3. 37 = 0
y - 111 = 0
y = 0 + 111
y = 111
Chúc bạn học giỏi nhé! Nếu đúng thì k nha bạn!
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Trả lời
(98,7.546-222:3).(1,6-3,2:2)
=(98,7.546-222:3).(1,6-1,6)
=(98,7.546-222:3).0
=0
Lưu ý: Ở đây dấu . là nhân nhé !
Lần sau bạn viết bằng số đc ko? Nhìn thế này rắc rối lắm.
( 98,7 x 546 - 222 : 3 ) x ( 1,6 - 3,2 : 2 )
= ( 98,7 x 546 - 222 : 3 ) x ( 1,6 - 1,6 )
= ( 98,7 x 546 - 222 : 3 ) x 0
= 0
![](https://rs.olm.vn/images/avt/0.png?1311)
Đề là tìm x?
\(x-\frac{4}{5}:\frac{2}{7}=\frac{8}{35}\)
\(x-\frac{4}{5}\times\frac{7}{2}=\frac{8}{35}\)
\(x-\frac{4\times7}{5\times2}=\frac{8}{35}\)
\(x-\frac{28}{10}=\frac{8}{35}\)
\(x=\frac{8}{35}+\frac{28}{10}\)
\(x=\frac{16}{70}+\frac{196}{70}\)
\(x=\frac{16+196}{70}\)
\(x=\frac{212}{70}=\frac{106}{35}\)
Vậy x = 106/35
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x-\frac{4}{5}:\frac{2}{7}=\frac{8}{35}\)
\(x-\frac{4}{5}x\frac{7}{2}=\frac{8}{35}\)
\(x-\frac{14}{5}=\frac{8}{35}\)
\(x=\frac{8}{35}+\frac{14}{5}\)
\(x=\frac{8}{35}+\frac{89}{35}\)
\(x=\frac{97}{35}\)
# Chúc bạn học tốt #
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\(\left(1-\frac{1}{2}\right)\left(1-\frac{1}{3}\right)\left(1-\frac{1}{4}\right)\left(1-\frac{1}{5}\right)\left(1-\frac{1}{6}\right)\)
\(=\left(\frac{2-1}{2}\right)\left(\frac{3-1}{3}\right)\left(\frac{4-1}{4}\right)\left(\frac{5-1}{5}\right)\left(\frac{6-1}{6}\right)\)
\(=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.\frac{4}{5}.\frac{5}{6}\)
\(=\frac{1}{6}\)
35 - 5x2:6
= 35 - 5:3
= \(\dfrac{105}{3}\) - \(\dfrac{5}{3}\)
= \(\dfrac{100}{3}\)
\(35-\left(5\times-2\right):6\)
\(=35-\left(-10\right):6\)
\(=35--\dfrac{5}{3}\)
\(=\dfrac{110}{3}\)