四点二五除以二点五乘以九点九加零点一七简便计算

2024-12-15 01:34:21
推荐回答(1个)
回答1:

4.25÷2.5×9.9+0.17
=1.7×9.9+0.17
=0.17×99+0.17
=0.17×(99+1)
=0.17×100
=17