Các câu hỏi tương tự
3 giờ 12 phút x9
3,75 phút x 15
6,15 giây x 20
16 tháng 10 2021 lúc 15:24
VÒNG 2Bài 1: Mèo con nhanh nhẹndfrac{1}{2} + dfrac{1}{12}2 + dfrac{1}{6}dfrac{1}{20}1 - dfrac{1}{9} dfrac{1}{15} + dfrac{2}{15}dfrac{1}{2} + dfrac{2}{3}dfrac{7}{12}dfrac{4}{12} dfrac{9}{14}+ dfrac{1}{14}1 + dfrac{1}{6}dfrac{1}{4} - dfrac{1}{5}dfrac{1}{3} - dfrac{2}{9} dfrac{3}{2} + dfrac{2}{3}dfrac{1}{5}1 - dfrac{8}{9} dfrac{5}{7}1 - dfrac{2}{3}dfrac{1}{3} + dfrac{5}{9}
Đọc tiếp
VÒNG 2
Bài 1: Mèo con nhanh nhẹn
| \(\dfrac{1}{2}\) + \(\dfrac{1}{12}\) | 2 + \(\dfrac{1}{6}\) | \(\dfrac{1}{20}\) | 1 - \(\dfrac{1}{9}\) | |
| \(\dfrac{1}{15}\) + \(\dfrac{2}{15}\) | \(\dfrac{1}{2}\) + \(\dfrac{2}{3}\) | \(\dfrac{7}{12}\) | \(\dfrac{4}{12}\) | |
| \(\dfrac{9}{14}\)+ \(\dfrac{1}{14}\) | 1 + \(\dfrac{1}{6}\) | \(\dfrac{1}{4}\) - \(\dfrac{1}{5}\) | \(\dfrac{1}{3}\) - \(\dfrac{2}{9}\) | |
| \(\dfrac{3}{2}\) + \(\dfrac{2}{3}\) | \(\dfrac{1}{5}\) | 1 - \(\dfrac{8}{9}\) | ||
| \(\dfrac{5}{7}\) | 1 - \(\dfrac{2}{3}\) | \(\dfrac{1}{3}\) + \(\dfrac{5}{9}\) |
a. Tìm a, biết: 1 - ( 5dfrac{4}{9} + a - 7dfrac{7}{18} ) : 15dfrac{3}{4} 0b. Tính b ( dfrac{2}{15} + dfrac{5}{3} - dfrac{3}{5} ) : ( 4dfrac{2}{3} - 2dfrac{1}{2} )
Đọc tiếp
a. Tìm a, biết: 1 - ( 5\(\dfrac{4}{9}\) + a - 7\(\dfrac{7}{18}\) ) : 15\(\dfrac{3}{4}\) = 0
b. Tính b = ( \(\dfrac{2}{15}\) + \(\dfrac{5}{3}\) - \(\dfrac{3}{5}\) ) : ( \(4\dfrac{2}{3}\) - \(2\dfrac{1}{2}\) )
16 tháng 10 2021 lúc 20:54
\(\dfrac{1}{15}\)+ \(\dfrac{2}{15}\)
\(\dfrac{4}{15}\) \(\times\) \(\dfrac{15}{2}\)
20 tháng 9 2023 lúc 17:35
\(a,\dfrac{15-x}{14}=\dfrac{5}{7}\)
\(b,\dfrac{x}{9}=\dfrac{17}{3}\)
\(c,15-\dfrac{x}{2}=\dfrac{3}{7}\)
Tìm x
a. (72 - 8 x9) : (20 + 21 + 22 + 23 + 24 + 25)
b. (500 x 9 - 250 x 18 ) x (1 + 2 + 3 + ...+ 9)
c. (11 + 13 + 15 + ...+ 19) x (6 x 8 - 48)
Tính nhanh:
\(\dfrac{2}{3}\) + \(\dfrac{2}{15}\) + \(\dfrac{2}{35}\) + \(\dfrac{2}{63}\) + \(\dfrac{2}{99}\) + \(\dfrac{2}{143}\) .
\(\dfrac{2}{3}\) + \(\dfrac{7}{15}\)- \(\dfrac{2}{5}\)