thực hiện phép tính:
11, (3,2).\(\frac{-15}{64}+\left(0.8-2\frac{4}{15}\right):3\frac{2}{3}\)
toán 6 cần ngay!
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thực hiện phép tính \(\left(-3,2\right).\frac{-15}{64}+\left(0,8-2\frac{4}{15}\right):3\frac{2}{3}\)
(-3,2) . \(\frac{-15}{64}\)+(0,8-2\(\frac{4}{15}\)):3\(\frac{2}{3}\)
=\(\frac{3}{4}\)+(-\(\frac{22}{15}\)):\(\frac{11}{3}\)
=\(\frac{3}{4}\)+\(\left(-\frac{22}{15}\right).\frac{3}{11}\)
=\(\frac{3}{4}\)-\(\frac{2}{5}=\frac{7}{20}\)
chọn đúng giúp mình nha!
\(\left(-3,2\right).\frac{-15}{64}+\left(0,8-2\frac{4}{15}\right):3\frac{1}{2}=-\frac{16}{5}.-\frac{15}{64}+\left(\frac{4}{5}-\frac{34}{15}\right):\frac{7}{2}\)
\(=-\frac{3}{4}+\left(-\frac{22}{15}\right).\frac{2}{7}\)
\(=-\frac{3}{4}-\frac{44}{105}\)
\(=\frac{-315-176}{420}\)
\(=-\frac{491}{420}\)
\(\left(-3,2\right)\cdot\frac{-15}{64}+\left(0,8-2\frac{4}{15}\right):3\frac{1}{2}\)
\(=\frac{3}{4}+\frac{-22}{15}:\frac{7}{2}\)
\(=\frac{3}{4}+\frac{-44}{105}\)
\(=\frac{-315}{176}\)
=))
A/ \(\left(15-6\frac{13}{18}\right):11\frac{1}{27}-2\frac{1}{8}:1\frac{11}{40}\)
\(=\left(15-\frac{121}{18}\right):\frac{298}{27}-\frac{17}{8}:\frac{51}{40}\)
\(=\left(\frac{270}{18}-\frac{121}{18}\right):\frac{298}{27}-\frac{17}{8}:\frac{51}{40}\)
\(=\frac{149}{18}:\frac{298}{27}-\frac{17}{8}:\frac{51}{40}\)
\(=\frac{3}{4}-\frac{5}{3}\)
\(=\frac{9}{12}-\frac{20}{12}\)\(=-\frac{11}{12}\)
B/ \(\left(-3,2\right)\cdot-\frac{15}{64}+\left(0,8-2\frac{4}{15}\right):3\frac{2}{3}\)
\(=\left(-3,2\right)\cdot-\frac{15}{64}+\left(0,8-\frac{34}{15}\right):\frac{11}{3}\)
\(=-\frac{3,2}{1}\cdot-\frac{15}{64}+\left(0,8-\frac{34}{15}\right):\frac{11}{3}\)
\(=\frac{48}{64}+\left(0,8-\frac{34}{15}\right):\frac{11}{3}\)
\(=\frac{3}{4}+\left(\frac{12}{15}-\frac{34}{15}\right):\frac{11}{3}\)
\(=\frac{3}{4}+\left(-\frac{22}{15}\right):\frac{11}{3}\)
\(=\frac{3}{4}+\left(-\frac{2}{5}\right)\)
\(=\frac{15}{20}+\left(-\frac{8}{20}\right)\)
\(=\frac{7}{20}\)
\(\left(\frac{2}{5}\right)^6.\left(\frac{25}{4}\right)^2\)
\(=\left[\left(\frac{2}{5}\right)^3\right]^2.\left(\frac{25}{4}\right)^2\)
\(=\left[\left(\frac{2}{5}\right)^3.\frac{25}{4}\right]^2\)
\(=\left[\frac{8}{125}.\frac{25}{4}\right]^2\)
\(=\left(\frac{2}{5}\right)^2\)
\(=\frac{4}{25}\)
\(15\frac{1}{5}:\left(\frac{-5}{7}\right)-25\frac{1}{5}.\left(\frac{-7}{5}\right)\)
\(=15\frac{1}{5}.\frac{-7}{5}-25\frac{1}{5}.\frac{-7}{5}\)
\(=\frac{-7}{5}\left(15\frac{1}{5}-25\frac{1}{5}\right)\)
\(=\frac{-7}{5}.\left(-10\right)\)
\(=14\)
mình giúp cho
= -16 / 5 . -15 / 64 + ( 4 / 5 - 34 / 15 ) : 11 / 3
= - 16 / 5 . -15 / 64 + -22 / 15 : 11 / 3
= 3 / 4 + -22 / 15 : 11 / 3
= 3 / 4 + - 2 / 5
= 7 / 20
xong , lần sau nhớ giúp mình nhé ! bye
\(\frac{7}{20}\)đó bn, tính số thập phân ra phân số rồi tính lần lượt.thế nha ^-^
sai rùi bạn ơi!