Question

三分之二÷九分之八×(1-四分之一) （二分之一+三分之一）÷五分之二-四分之三（怎么简算

Answer 1

2/3 ÷8/9 ×(1-1/4)

=2/3 ÷8/9×3/4

=2/3 ×9/8×3/4

=3/4×3/4

=9/16

(1/2+1/3)÷2/5-3/4

=(3/6+2/6)÷2/5-3/4

=5/6÷2/5-3/4

=5/6×5/2-3/4

=25/12-9/12

=16/12

=4/3