Question

Tính hợp lý

a. M=\(\left(\dfrac{1284}{1391}+\dfrac{212121}{656565}\right):\left(\dfrac{27}{13}\cdot3\right)\)

Answer 1

a. \(M=\left(\frac{12}{13}+\frac{21}{65}\right):\frac{81}{13}\)

\(M=\left(\frac{120}{130}+\frac{42}{130}\right).\frac{13}{81}\)

\(M=\frac{81}{65}.\frac{13}{81}\)

\(M=\frac{1}{5}\)

Answer 2

M=(12.107/13.107 + 21.10101/65.10101):27.3/13=(12/13 + 21/65):27.3/13

=[(12.5+21)/65]:27.3/13

=81/13.5 : 27.3/13 =81/(5.27.3)=1/5

Đs: M=1/5

Answer 3

1/5 bạn