Đáp án + Giải thích các bước giải:
m, `5/7 . 5/11 + 5/7 . 2/11 - 5/7 . 14/11`
` = 5/7 . (5/11 + 2/11 - 14/11)`
` = 5/7 . (-7)/11`
` = -5/11`
n, `(3 2/5 - 2/5) . (-5)/3 + 3 . (2 1/2 : 1/2)`
` = 3 . (-5)/3 + 3 . (5/2 : 1/2)`
` = (-5) + 3 . 5`
` = (-5) + 15`
` = 10`
l, `1 13/15 . (0,5)^2 . 3 + ( 8/15 + 1 19/60) : 1 23/24`
` = 28/15 . (1/2)^2 . 3 + ( 8/15 + 79/60) : 47/24`
` = 28/15 . 1/4 . 3 + ( 32/60 + 79/60) : 47/24`
` = 7/5 + 111/60 : 47/24`
` = 7/5 + 222/235`
` = 329/235 + 222/235`
` = 551/235`
s, `2 2/9 : 1 1/9 - 46/5 : 4 3/5`
` = 20/9 : 10/9 - 46/5 : 23/5`
` = 2 - 2`
` = 0`
