\(\dfrac{8}{7}-\left(-\dfrac{7}{8}\right)\\ =\dfrac{8}{7}+\dfrac{7}{8}=\dfrac{8\times8+7\times7}{56}=\dfrac{113}{56}\)
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Bài 8: Tính bằng hai cách
\(\left(\dfrac{7}{9}+\dfrac{5}{6}\right)x\dfrac{3}{5}\)
Tính:
a) \(\dfrac{11}{10}+\dfrac{3}{5}:\dfrac{2}{3}\)
b) \(\dfrac{4}{3}\) + 5 x \(\dfrac{5}{8}\)
c) \(\left(\dfrac{2}{5}+\dfrac{3}{7}\right)x\dfrac{25}{29}\)
d) \(\dfrac{1}{4}x\dfrac{5}{12}+\dfrac{5}{12}x\dfrac{4}{5}\)
A,\(\dfrac{8}{9}:\dfrac{4}{5}+\dfrac{3}{5}\)
B,\(\dfrac{5}{8}\) + \(\dfrac{1}{4}\)
C,\(\dfrac{7}{8}\) x \(\dfrac{4}{7}\) +\(\dfrac{5}{9}\)
D,\(\dfrac{9}{8}:\dfrac{4}{3}-\dfrac{4}{7}\)
21 tháng 2 2022 lúc 12:26
\(\dfrac{5}{7}...\dfrac{8}{7}\) ; \(^{\dfrac{6}{7}...\dfrac{8}{7}}\)
so sánh
\dfrac{61}{7}-\left(\dfrac{7}{6}+\dfrac{10}{7}\right)761−(67+710)
dfrac{3}{7} + 4 ?dfrac{5}{9} x 3 ?dfrac{7}{8} - dfrac{2}{9} ?5 - dfrac{3}{4} ?dfrac{5}{7} : 6 ?dfrac{5}{6} x dfrac{2}{7} ?3 + dfrac{3}{4} ?dfrac{3}{5}xdfrac{4}{8} ?5 : dfrac{3}{8} ?Mong mn trả lời
Đọc tiếp
\(\dfrac{3}{7}\) + 4 = ?
\(\dfrac{5}{9}\) x 3 = ?
\(\dfrac{7}{8}\) - \(\dfrac{2}{9}\)= ?
5 - \(\dfrac{3}{4}\)= ?
\(\dfrac{5}{7}\) : 6 = ?
\(\dfrac{5}{6}\) x \(\dfrac{2}{7}\)= ?
3 + \(\dfrac{3}{4}\)= ?
\(\dfrac{3}{5}x\dfrac{4}{8}\) = ?
5 : \(\dfrac{3}{8}\)= ?
Mong mn trả lời
\(\dfrac{9}{14}:\dfrac{3}{7}+\dfrac{5}{6}=\)
\(\dfrac{4}{7}x\left(4-\dfrac{7}{3}\right)\)
giup mik đi. đúng mik tick choa/33☺
7 tháng 5 2023 lúc 21:31
Phân số nào nhỏ nhất trong các phân số sau: \(\dfrac{6}{7}\);\(\dfrac{8}{7}\);\(\dfrac{12}{14}\);\(\dfrac{3}{4}\)
A. \(\dfrac{6}{7}\) B. \(\dfrac{8}{7}\) C. \(\dfrac{12}{14}\) D. \(\dfrac{3}{4}\)
Tính nhanh:
\(\dfrac{9}{8}x\dfrac{8}{7}x\dfrac{7}{3}x\dfrac{1}{3}\)
Tính :a) 7 x dfrac{3}{14} - dfrac{1}{14} b) dfrac{3}{2} + dfrac{7}{4} x dfrac{2}{5}c) dfrac{9}{8} : 3 + dfrac{7}{8} : 3 d) 2 : dfrac{3}{4} - dfrac{5}{8} x dfrac{4}{3}
Đọc tiếp
Tính :
a) 7 x \(\dfrac{3}{14}\) - \(\dfrac{1}{14}\) b) \(\dfrac{3}{2}\) + \(\dfrac{7}{4}\) x \(\dfrac{2}{5}\)
c) \(\dfrac{9}{8}\) : 3 + \(\dfrac{7}{8}\) : 3 d) 2 : \(\dfrac{3}{4}\) - \(\dfrac{5}{8}\) x \(\dfrac{4}{3}\)