Tính bằng cách thuận tiện nhất : 30/11 x 66/25 x75/210 (8/11+3/12)+3/11 22/10/2021 Bởi Alaia Tính bằng cách thuận tiện nhất : 30/11 x 66/25 x75/210 (8/11+3/12)+3/11
$30/11$ x$ 66/25$ x$75/210$ $= 30 \times 66 \times 75/11 \times 25 \times 210$ $= 1 \times 6 \times 3/1 \times 1 \times 7$ $= 18/7$ $(8/11+3/12)+3/11$ $=(8/11+3/11)+3/12$ $= 11/11 + 3/12$ $= 1 + 1/4$ $= 5/4$ Bình luận
$\frac{30}{11}$ × $\frac{66}{25}$ × $\frac{75}{210}$ = $\frac{30×66×75}{11×25×210}$ = $\frac{18}{7}$ ($\frac{8}{11}$ + $\frac{3}{12}$) + $\frac{3}{11}$ = $\frac{8}{11}$ + $\frac{3}{12}$ + $\frac{3}{11}$ = ($\frac{8}{11}$ + $\frac{3}{11}$) + $\frac{3}{12}$ = $\frac{11}{11}$ + $\frac{3}{12}$ = 1 + $\frac{3}{12}$ = 1 + $\frac{1}{4}$ = $\frac{5}{4}$ Bình luận
$30/11$ x$ 66/25$ x$75/210$
$= 30 \times 66 \times 75/11 \times 25 \times 210$
$= 1 \times 6 \times 3/1 \times 1 \times 7$
$= 18/7$
$(8/11+3/12)+3/11$
$=(8/11+3/11)+3/12$
$= 11/11 + 3/12$
$= 1 + 1/4$
$= 5/4$
$\frac{30}{11}$ × $\frac{66}{25}$ × $\frac{75}{210}$ = $\frac{30×66×75}{11×25×210}$
= $\frac{18}{7}$
($\frac{8}{11}$ + $\frac{3}{12}$) + $\frac{3}{11}$ = $\frac{8}{11}$ + $\frac{3}{12}$ + $\frac{3}{11}$ = ($\frac{8}{11}$ + $\frac{3}{11}$) + $\frac{3}{12}$ = $\frac{11}{11}$ + $\frac{3}{12}$ = 1 + $\frac{3}{12}$ = 1 + $\frac{1}{4}$ = $\frac{5}{4}$