a)735×28= 2167×325= 31286×403= b)3/28×4/9= 8/21×27= 45/32:9/16= c)6/7×21/25= 2/5+11/15= 5/18:4/9= d)97,65:6,3= 41,5:3,32= 13,16:0,56= e)17giờ 20phút:8
a)735×28= 2167×325= 31286×403= b)3/28×4/9= 8/21×27= 45/32:9/16= c)6/7×21/25= 2/5+11/15= 5/18:4/9= d)97,65:6,3= 41,5:3,32= 13,16:0,56= e)17giờ 20phút:8= 6giờ45phút+12giờ15phút:5=