72×(5/9×3/4-5/18) 简算
问题描述：
72×(5/9×3/4-5/18) 简算
答
72×(5/9×3/4-5/18)
=72×(5/9×3/4-5/9×1/2)
=72×[5/9×(3/4-1/2)]
=72×5/9×1/4
=8×5×1/4
=2×5
10
答
原式=72*5/9(3/4-1/2)
=40*1/4
=10