Toán giai bai tâp ( 9/11-5/7)x3/4 giai băng 2 cach 29/11/2021 By Iris giai bai tâp ( 9/11-5/7)x3/4 giai băng 2 cach
Đáp án: c1: (9/11-5/7)*3/4=(63/11-55/77)*3/4=8/77*3/4=6/77 c2: (9/11-5/7)*3/4=9/11*3/4-5/7*3/4=27/44-15/28=6/77 Trả lời
Đáp án:
c1:
(9/11-5/7)*3/4=(63/11-55/77)*3/4=8/77*3/4=6/77
c2:
(9/11-5/7)*3/4=9/11*3/4-5/7*3/4=27/44-15/28=6/77
C1
= 9/11×3/4-5/7×3/4
=27/44-15/28
=6/77
C2
=(63/77-55/77)x3/4
=8/77×3/4
=6/77