Bài1: a) (5 -1/2 -10/6) *21/33 b)x : 12,5 =0,99+1,2 20/09/2021 Bởi Delilah Bài1: a) (5 -1/2 -10/6) *21/33 b)x : 12,5 =0,99+1,2
a/ $\bigg(5-\dfrac{1}{2}-\dfrac{10}{6}\bigg)×\dfrac{21}{33}$ $=\bigg(\dfrac{30}{6}-\dfrac{3}{6}-\dfrac{10}{6}\bigg)×\dfrac{21}{33}$ $=\dfrac{17}{6}×\dfrac{21}{33}$ $=\dfrac{119}{66}$ b/ $x:12,5=0,99+1,2$ $=>x:12,5=2,19$ $=>x=27,375.$ Bình luận
a ( 5 – 1/2 – 10/6 ) x 21/33 = 17/6 x 21/33 = 119/66 b x : 12,5 = 0,99 + 1,2 x : 12,5 = 2,19 x = 2,19 x 12,5 x = 27 , 375 Bình luận
a/
$\bigg(5-\dfrac{1}{2}-\dfrac{10}{6}\bigg)×\dfrac{21}{33}$
$=\bigg(\dfrac{30}{6}-\dfrac{3}{6}-\dfrac{10}{6}\bigg)×\dfrac{21}{33}$
$=\dfrac{17}{6}×\dfrac{21}{33}$
$=\dfrac{119}{66}$
b/
$x:12,5=0,99+1,2$
$=>x:12,5=2,19$
$=>x=27,375.$
a ( 5 – 1/2 – 10/6 ) x 21/33
= 17/6 x 21/33
= 119/66
b x : 12,5 = 0,99 + 1,2
x : 12,5 = 2,19
x = 2,19 x 12,5
x = 27 , 375