Bài 3: Tính hợp lí:
c) -3/4 + ( 3-1/4) - (2,25- 9/4) e) -14/12 + 0,65 - (-7/42 - 0,35)<!--[if gte vml 1]> <!--[endif]--><!--[if gte mso 9]--><xml> </xml><![endif]-->
g) (-2/5 ) . 4/15 + ( -3/10) . 4/15 k) (4/5 + - 9/7) : 2021/2022 + (-5/7 - -6/5) :2021/2022