( 2,5.0,375.0,4 ) -- ( 0,125.3,25. (-8) )

Cặp Đôi Bạn Thân

18 tháng 9 2016 lúc 13:24

bai 1 tinh nhanh

a) (-2,5.0,375.0,4)-[0,125.3,25.(-8)]

b) [(-30,27).0,5+(-9,37).0,5]:[3,116.0,8-(-1,884).0,8]

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Lớp 7 Toán Câu hỏi của OLM

nguyen van truong

8 tháng 7 2015 lúc 11:54

tinh nhanh nha cac bn giup gium mink

a) -(315.4+275)+4.315-(10-275)

b) [(-2,5.0,375.0,4]-[0,125.3,25.(-8)]

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Lớp 7 Toán Câu hỏi của OLM

Nguyễn Thị Quỳnh

8 tháng 7 2015 lúc 12:08

A,= -315.4-275+4.315-10+275

=[(-315.4)+4.315]+(-275+275)-10

=-10

b,=[(-2,5.0,4).0,375]-[(-8.0,125).3,25]

=[-1.0,375]-[(-1).3,25]

=-0,375-(-3,25)

=-0,375+3,25=2,875

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tttttttttrrrrrr

14 tháng 6 2015 lúc 21:20

1) (-2,5.0,375.0,4)-[0,125.3,25.(-8)]=?

2) Tìm GTLN của Q = 19,5 - |1,5-x| là bao nhiêu

3) Tìm GTNN của A=x⁴+ 3x²- 4

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Lớp 7 Toán Câu hỏi của OLM

Phạm Tú Uyên

2 tháng 6 2019 lúc 19:56

Bài 1: Tìm x biết:a. left|x-3,5right|7,5b. left|x+frac{3}{4}right|-frac{1}{2}0c. 3,6-left|x-0,4right|0d. left|x-frac{1}{2}right|-frac{1}{3}1Bài 2: Tính nhanhleft(-2,5.0,375.0,4right)-left[0,125.3,25.left(-8right)right]

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Bài 1: Tìm x biết:
\(a.\) \(\left|x-3,5\right|=7,5\)
\(b.\) \(\left|x+\frac{3}{4}\right|-\frac{1}{2}=0\)

\(c.\) \(3,6-\left|x-0,4\right|=0\)

\(d.\) \(\left|x-\frac{1}{2}\right|-\frac{1}{3}=1\)

Bài 2: Tính nhanh

\(\left(-2,5.0,375.0,4\right)-\left[0,125.3,25.\left(-8\right)\right]\)

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Lớp 6 Toán Câu hỏi của OLM

Huỳnh Quang Sang

2 tháng 6 2019 lúc 20:00

Bài 1 : \(a,\left|x-3,5\right|=7,5\)

\(\Rightarrow\orbr{\begin{cases}x-3,5=7,5\\x-3,5=-7,5\end{cases}}\Rightarrow\orbr{\begin{cases}x=11\\x=-4\end{cases}}\)

\(b,\left|x+\frac{3}{4}\right|-\frac{1}{2}=0\)

\(\Rightarrow\left|x+\frac{3}{4}\right|=\frac{1}{2}\)

\(\Rightarrow\orbr{\begin{cases}x+\frac{3}{4}=\frac{1}{2}\\x+\frac{3}{4}=-\frac{1}{2}\end{cases}}\Rightarrow\orbr{\begin{cases}x=-\frac{1}{4}\\x=-\frac{5}{4}\end{cases}}\)

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Huỳnh Quang Sang

2 tháng 6 2019 lúc 20:04

\(c,3,6-\left|x-0,4\right|=0\)

\(\Rightarrow\left|x-0,4\right|=3,6\)

\(\Rightarrow\orbr{\begin{cases}x-0,4=3,6\\x-0,4=-3,6\end{cases}}\Rightarrow\orbr{\begin{cases}x=4\\x=-3,2\end{cases}}\)

\(d,\left|x-\frac{1}{2}\right|-\frac{1}{3}=1\)

\(\Rightarrow\left|x-\frac{1}{2}\right|=\frac{4}{3}\)

\(\Rightarrow\orbr{\begin{cases}x-\frac{1}{2}=\frac{4}{3}\\x-\frac{1}{2}=-\frac{4}{3}\end{cases}}\Rightarrow\orbr{\begin{cases}x=\frac{11}{6}\\x=-\frac{5}{6}\end{cases}}\)

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Nguyễn Vũ Minh Hiếu

2 tháng 6 2019 lúc 20:05

\(\left|x-3,5\right|=7,5\)

\(\Rightarrow\orbr{\begin{cases}x-3,5=7,5\\x-3,5=-7,5\end{cases}\Rightarrow\orbr{\begin{cases}x=7,5+3,5\\x=\left(-7,5\right)+3,5\end{cases}\Rightarrow}\orbr{\begin{cases}x=11\\x=-4\end{cases}}}\)

Vậy ......................

~ Hok tốt ~

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quynhanhshyn5

1 tháng 9 2015 lúc 7:52

bai 1 tim x

/x/=3,7

bai 2 tinh nhanh

(-2,5.0,375.4)-[0,125.3,25.(-8)]

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Lớp 7 Toán Câu hỏi của OLM

Minh Hiền

1 tháng 9 2015 lúc 7:55

1. |x|=3,7

=> x=3,7 hoặc x=-3,7

2. (-2,5.0,375.4)-[0,125.3,25.(-8)]

= [(-2,5.4).0,375]-[(-8.0,125).3,25]

= (-10.0,375)-(-1.3,25)

=-3,75-(-3,25)

= -3,75+3,25

= -0,5

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Kano

1 tháng 9 2015 lúc 7:57

Dấu / là dấu | phải không? Nếu đúng thì |x| = 3,7 => x \(\in\) {-3,7; 3,7}

Bài 2: (-2,5. 0,375. 4) - [0,125. 3,25. (-8)]

= -(2,5.4.0,375) + (0,125. 8. 3,25)

= (0,125.8.3,25) - (2,5.4.0,375)

= (1.3,25) - (10.0,375)

= 3,25 - 3,75 = -0,5

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như123

12 tháng 7 2018 lúc 11:35

Tính nhanh:

a) [(-6,8)+(-56,9)]+[(2,8)+(5,9)]

b) -(315.4+275)+4.315-(10-275)

c)[ (-2,5).0,375.0,4]-[0,125.3,25.(-8)]

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Lớp 6 Toán Câu hỏi của OLM

em bị ngu

4 tháng 3 2017 lúc 10:08

8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+9+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+9+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+...

Đọc tiếp

8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+9+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+9+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+9+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8

có bao nhiêu số khác biệt

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Lớp 5 Toán Câu hỏi của OLM

Miyuki Hoshizora

4 tháng 3 2017 lúc 10:10

có 3 số 9

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Khôi Nguyên Hacker Man

4 tháng 3 2017 lúc 10:09

có >10 số

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Le Minh Ngoc

4 tháng 3 2017 lúc 10:09

đáp án là 3

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em bị ngu

4 tháng 3 2017 lúc 10:03

8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+9+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+...

Đọc tiếp

8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+9+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8+8

số 9 ở dòng nào ?( ai trả lời nhanh sẽ được mình chọn)

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Lớp 5 Toán Câu hỏi của OLM