Violympic toán 7
Các câu hỏi tương tự
Tính
\(\left[18\frac{1}{6}-\left(0,06:7\frac{1}{2}+3\frac{2}{3}.0,38\right)\right]:\left(19-2\frac{2}{3}.4\frac{3}{4}\right)\)
1.thực hiện phép tính
a.25.left(frac{-1}{5}right)^3+frac{1}{5}-2.left(frac{-1}{2}right)^2-frac{1}{2}
b.35^1_6:left(frac{-4}{5}right)-46^1_6:left(frac{-4}{5}right)
c.left(frac{-3}{4}+frac{2}{5}right):frac{3}{7}+left(frac{3}{5}+frac{-1}{4}right):frac{3}{7}
d.frac{7}{8}:left(frac{2}{9}-frac{1}{18}right)+frac{7}{8}.left(frac{1}{36}-frac{5}{12}right)
e.frac{1}{6}+frac{5}{6}.frac{3}{2}-frac{3}{2}+1
f.left(-0,75-frac{1}{4}right):left(-5right)+frac{1}{15}-left(frac{-1}{5}right):left(-3right)
Đọc tiếp
1.thực hiện phép tính
a.\(25.\left(\frac{-1}{5}\right)^3+\frac{1}{5}-2.\left(\frac{-1}{2}\right)^2-\frac{1}{2}\)
b.\(35^1_6:\left(\frac{-4}{5}\right)-46^1_6:\left(\frac{-4}{5}\right)\)
c.\(\left(\frac{-3}{4}+\frac{2}{5}\right):\frac{3}{7}+\left(\frac{3}{5}+\frac{-1}{4}\right):\frac{3}{7}\)
d.\(\frac{7}{8}:\left(\frac{2}{9}-\frac{1}{18}\right)+\frac{7}{8}.\left(\frac{1}{36}-\frac{5}{12}\right)\)
e.\(\frac{1}{6}+\frac{5}{6}.\frac{3}{2}-\frac{3}{2}+1\)
f.\(\left(-0,75-\frac{1}{4}\right):\left(-5\right)+\frac{1}{15}-\left(\frac{-1}{5}\right):\left(-3\right)\)
13 tháng 3 2020 lúc 20:02
Tính giá trị biểu thức sau:
Bleft(18frac{1}{3}:sqrt{225}+8frac{2}{3}.sqrt{frac{49}{4}}right):left[left(12frac{1}{3}+8frac{6}{7}right)-frac{left(sqrt{7}right)^2}{left(3.sqrt{2}right)^2}right]:frac{1704}{445}
Cfrac{left(81,624:4frac{4}{3}-4,505right)^2+125frac{3}{4}}{left{left[left(frac{11}{25}right)^2:0,88+3,53right]^2-left(2,75right)^2right}:frac{13}{25}}
P/s: Giúp mik với ạ! Nguyễn Văn Đạt ; @Vũ Minh Tuấn; @Phạm Thị Diệu Huyền; ..........
Đọc tiếp
Tính giá trị biểu thức sau:
\(B=\left(18\frac{1}{3}:\sqrt{225}+8\frac{2}{3}.\sqrt{\frac{49}{4}}\right):\left[\left(12\frac{1}{3}+8\frac{6}{7}\right)-\frac{\left(\sqrt{7}\right)^2}{\left(3.\sqrt{2}\right)^2}\right]:\frac{1704}{445}\)
\(C=\frac{\left(81,624:4\frac{4}{3}-4,505\right)^2+125\frac{3}{4}}{\left\{\left[\left(\frac{11}{25}\right)^2:0,88+3,53\right]^2-\left(2,75\right)^2\right\}:\frac{13}{25}}\)
P/s: Giúp mik với ạ! Nguyễn Văn Đạt ; @Vũ Minh Tuấn; @Phạm Thị Diệu Huyền; ..........
tính giá trị biểu thức
A=\(\frac{\left[1+2+3+......+100\right].\left[\frac{1}{2}-\frac{1}{3}-\frac{1}{4}-\frac{1}{5}\right].\left[2,4.42-21.4,8\right]}{1+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+....+\frac{1}{100}}\)
tính: \(1+\frac{1}{2}\left(1+2\right)+\frac{1}{3}\left(1+2+3\right)+\frac{1}{4}\left(1+2+3+4\right)+...+\frac{1}{16}\left(1+2+3+...+16\right)\)
\(\frac{\left(13\frac{1}{4}-2\frac{5}{27}-10\frac{5}{6}\right).230\frac{1}{25}+46\frac{3}{4}}{\left(1\frac{3}{7}+\frac{10}{3}\right):\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)
Tính nhanh :
\(B=\left(-\frac{1}{2}\right)-\left(-\frac{3}{5}\right)+\left(-\frac{1}{9}\right)+\frac{1}{131}-\left(-\frac{2}{7}\right)+\frac{4}{35}-\frac{7}{18}\)
\(\frac{0,8:\left(\frac{4}{5}.1,25\right)}{0,64-\frac{1}{25}}+\frac{\left(1,08-\frac{2}{25}\right):\frac{4}{7}}{\left(6\frac{5}{9}-3\frac{1}{4}\right).2\frac{2}{17}}+\left(1,2.0,5\right):\frac{4}{5}\)
a)\(\left(\frac{2}{3}+\frac{4}{5}+\frac{12}{7}\right)+\left(2^7.5^6-\frac{25^3}{\left(0.125\right)3}\right).\left(0.0001\right)^2\)
b) \(2\frac{1}{315}.\frac{1}{651}-\frac{1}{105}.3\frac{650}{651}-\frac{4}{315.651}+\frac{4}{105}\)