24/5×(3/4+8/6)—4/5÷2/9=?

问题描述:

24/5×(3/4+8/6)—4/5÷2/9=?

24/5×(3/4+8/6)—4/5÷2/9
=4/5 ×6×(3/4+8/6)—4/5 ×9/2
=4/5 ×(9/2+8)—4/5 ×9/2
=4/5 ×(9/2+8 -9/2)
=4/5 ×8
=32/5
=6又5分之2