61.2减1.8乘以3减4.6用简便计算
问题描述：
61.2减1.8乘以3减4.6用简便计算
答
61.2﹣1.8×3﹣4.6
＝61.2－5.4﹣4.6
＝61.2﹣﹙5.4﹢4.6﹚
＝61.2﹣10
＝51.2
答
61.2-1.8×3-4.6
=61.2-5.4-4.6
=61.2-（5.4+4.6）
=61.2-10
=51.2