4.25÷2.5×9.9+0.17简算
问题描述:
4.25÷2.5×9.9+0.17简算
答
4.25÷2.5×9.9+0.17
=1.7×9.9+0.17 我们从这里开始简便计算
=0.17×99+0.17
=0.17×99+0.17×1
=0.17×(99+1)
=0.17×100
17
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