1Tính nhanh A/ 12/5 x 4 -4 x 5/7 B/ 315/316 x 313/314 x 316/315 x 317/313 20/07/2021 Bởi Harper 1Tính nhanh A/ 12/5 x 4 -4 x 5/7 B/ 315/316 x 313/314 x 316/315 x 317/313
`a,12/5 × 4 – 4 × 5/7` `= 4 × ( 12/5 – 5/7)` `= 4 × 59/35` `= 236/35` `b,315/316 × 313/314 × 316/315 × 317/313` `= [315×313×316×317]/[316×314×315×313]` `= 317/314` Xin hay nhất ! Bình luận
A) $\frac{12}{5}$ . 4 – 4 . $\frac{5}{7}$ = 4 . ($\frac{12}{5}$ – $\frac{5}{7}$) = 4 . 1$\frac{24}{35}$ = 6$\frac{26}{35}$ B) $\frac{315}{316}$ . $\frac{313}{314}$ . $\frac{316}{315}$ . $\frac{317}{313}$ = $\frac{315.313.316.317}{316.314.315.313}$ = $\frac{317}{314}$ Chúc học tốt!!! Bình luận
`a,12/5 × 4 – 4 × 5/7`
`= 4 × ( 12/5 – 5/7)`
`= 4 × 59/35`
`= 236/35`
`b,315/316 × 313/314 × 316/315 × 317/313`
`= [315×313×316×317]/[316×314×315×313]`
`= 317/314`
Xin hay nhất !
A) $\frac{12}{5}$ . 4 – 4 . $\frac{5}{7}$
= 4 . ($\frac{12}{5}$ – $\frac{5}{7}$)
= 4 . 1$\frac{24}{35}$
= 6$\frac{26}{35}$
B) $\frac{315}{316}$ . $\frac{313}{314}$ . $\frac{316}{315}$ . $\frac{317}{313}$
= $\frac{315.313.316.317}{316.314.315.313}$
= $\frac{317}{314}$
Chúc học tốt!!!