Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{12,48:0,5.6,25.4.2}{2.3,12.1,25:0,25.10}\)= \(\frac{12,48.2.6.25.4.2}{2.3,12.1,25.4.10}\)= \(\frac{3,12.4.2.1,25.5.4.2}{2.3,12.1,25.4.5.2}\)= \(4\)
c) 0,1+0,2-0,3-0,4+0,5+0,6-0,7-0,8+0,9+0,10
=(0,1+0,2-0,3-0,4)+(0,5+0,6-0,7-0,8)+(0,9+0,1)
=-0,4+(-0,4)+1
=-0,8+1
=-0,2
ok rồi nha
6,25 . 1,25 . 2,4 . 0,8
= (6,25 . 2,4) . (1,25 . 0,8)
= 15 . 1
= 15
Các câu sau tương tự
Chúc bạn học tốt
b,4,7 + (-3,4) + 5,19 + 3,4 + (-4,7)
= [ 4,7 + (-4,7)] + [(-3,4) + 3,4] + 5,19
= 0 + 0 + 5,19
= 5,19
2x3,12x1,25x0,25x10=2x3,12x(1,25:0,25x10)
=2x3,12 x50
=100x3,12=312
a: \(=\dfrac{15}{4}:\dfrac{2-7}{16}-\dfrac{5}{9}\cdot\left(\dfrac{3}{5}+\dfrac{4}{5}\right)\)
\(=\dfrac{15}{4}\cdot\dfrac{16}{-5}-\dfrac{5}{9}\cdot\dfrac{7}{5}\)
\(=\dfrac{-240}{20}-\dfrac{7}{9}=-12-\dfrac{7}{9}=\dfrac{-115}{9}\)
c: \(=\dfrac{1}{5}-\dfrac{7}{2}-\dfrac{3}{2}+\dfrac{5}{4}\)
\(=\dfrac{4+25}{20}-5=\dfrac{29}{20}-\dfrac{100}{20}=\dfrac{-71}{20}\)
d: \(=\dfrac{12}{17}\left(1-\dfrac{1}{15}-\dfrac{4}{5}+1\right)=\dfrac{12}{17}\cdot\dfrac{17}{15}=\dfrac{12}{15}=\dfrac{4}{5}\)
e: \(=\dfrac{2}{15}\cdot\dfrac{9}{8}-\dfrac{7}{4}\cdot\dfrac{9}{8}+\dfrac{25}{36}\)
\(=\dfrac{9}{8}\left(\dfrac{2}{15}-\dfrac{7}{4}\right)+\dfrac{25}{36}\)
\(=\dfrac{9}{8}\cdot\dfrac{8-105}{60}+\dfrac{25}{36}\)
\(=\dfrac{9}{8}\cdot\dfrac{-97}{60}+\dfrac{25}{36}=\dfrac{-1619}{1440}\)
a, 2,5 x 16,27 x 4 + 7,3
\(=\left(2,5\times4\right)\times16,27+7,3\)
\(=10\times16,27+7,3\)
\(=162,7+7,3\)
\(=170\)
b, 0,25 x 1,25 x 8 x 4 x 0,5
\(=\left(0,25\times4\right)\times\left(1,25\times8\right)\times0,5\)
\(=1\times10\times0,5\)
\(=5\)
c, 500 x 3,26 x 0,02 : 0,5
\(=\left(500\times0,02\right)\times3,26\div0,5\)
\(=10\times3,26\times\frac{10}{5}\)
\(=3,26\times20\)
\(=65,2\)
d, 32,4 x 6,24 + 3,66 x 32,4 + 0,5
\(=32.4\times\left(3,66+6,24\right)+0,5\)
\(=32,4\times9,9+0,5\)
\(=320,76+0,5\)
\(=321,26\)
e, 17,2 x 9,55 + 9,45 x 17,2 + 17,2