\(A=\frac{40}{31}-\frac{40}{39}+\frac{35}{39}-\frac{35}{46}+\frac{30}{46}-\frac{30}{52}+\frac{25}{52}-\frac{25}{57}\)
\(A=\frac{1}{31}-\frac{1}{39}+\frac{1}{39}-\frac{1}{46}+\frac{1}{46}-\frac{1}{52}+\frac{1}{52}-\frac{1}{57}\)
\(A=\frac{1}{31}-\frac{1}{57}\)
tiếp theo tính A và B tương tự rồi tìm tỉ số, ta lấy A:B*100=?%
Tìm tỉ số \(\frac{A}{B}\) biết:
a) \(A=\frac{4}{31.7}+\frac{6}{7.41}+\frac{9}{10.41}+\frac{7}{10.57}\) ; \(B=\frac{7}{19.31}+\frac{5}{19.43}+\frac{3}{23.43}+\frac{11}{23.57}\)
b) \(A=\frac{40}{31.39}+\frac{35}{39.46}+\frac{30}{46.52}+\frac{25}{52.57}\); \(B=\frac{91}{19.31}+\frac{65}{19.43}+\frac{39}{23.43}+\frac{143}{69.19}\)
Tìm thương của phép chia A cho B
A=40/31.39 + 45/39.46 + 30/46.52 + 30/52.57
B=91/19.31 + 65/19.43 + 39/23.43 + 143/69.19
Cho A=\(\frac{40}{31.38}+\frac{35}{39.46}+\frac{30}{2392}+\frac{25}{2962}\) và B=\(\frac{91}{19.31}+\frac{65}{19.43}+\frac{39}{989}+\frac{143}{1311}\).Tìm \(\frac{A}{B}\)
\(A=\frac{40}{31.39}+\frac{35}{39.16}+\frac{30}{23.92}+\frac{25}{29.64}\) ; \(B=\frac{91}{19.31}+\frac{65}{19.43}+\frac{39}{989}+\frac{143}{1311}\).
Tính tỉ số A/B
Tính B=\(\frac{91}{19.31}+\frac{65}{19.43}+\frac{39}{23.43}+\frac{143}{69.19}\)
Tính : \(A=\frac{40}{31.39}+\frac{35}{39.46}+\frac{30}{46.52}+\frac{25}{52.57}\)
\(A=\frac{40}{31.39}+\frac{35}{39.46}+\frac{30}{46.52}+\frac{25}{52.57}\)
Thực hiện hợp lí nhé
Tính tổng:
E =\(\frac{40}{31.38}+\frac{35}{39.46}+\frac{30}{2392}+\frac{25}{2962}\)
F =\(\frac{91}{19.31}+\frac{65}{19.43}+\frac{39}{989}+\frac{143}{1311}\)
Tính tổng:
E =\(\frac{40}{31.38}+\frac{35}{39.46}+\frac{30}{2392}+\frac{25}{2962}\)
F =\(\frac{91}{19.31}+\frac{65}{19.43}+\frac{39}{989}+\frac{143}{1311}\)
