11.7—(3.7+8)/1.3=?(用简便方法计算)
问题描述:
11.7—(3.7+8)/1.3=?(用简便方法计算)
答
11.7—(3.7+8)/1.3
=11.7-11.7×(10/13)
=11.7(1-10/13)
=11.7×3/13
=2.7