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1.9+19.9+199.9+0.3用简便计算,怎么简算?
题目详情
1.9+19.9+199.9+0.3用简便计算,怎么简算?
▼优质解答
答案和解析
1.9+19.9+199.9+0.3
=2-0.1+20-0.1+200-0.1+0.3
=2+20+200
=222
满意采纳,不懂追问
=2-0.1+20-0.1+200-0.1+0.3
=2+20+200
=222
满意采纳,不懂追问
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