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用简便方法计算下面各题.9.6×28.5+0.285×40;1.6×2.64+1.6×6.36+1.6.
题目详情
用简便方法计算下面各题.
9.6×28.5+0.285×40;
1.6×2.64+1.6×6.36+1.6.
9.6×28.5+0.285×40;
1.6×2.64+1.6×6.36+1.6.
▼优质解答
答案和解析
(1)9.6×28.5+0.285×40
=9.6×28.5+28.5×0.4
=28.5×(9.6+0.4)
=28.5×10
=285
(2)1.6×2.64+1.6×6.36+1.6
=1.6×(2.64+6.36+1)
=1.6×10
=16
=9.6×28.5+28.5×0.4
=28.5×(9.6+0.4)
=28.5×10
=285
(2)1.6×2.64+1.6×6.36+1.6
=1.6×(2.64+6.36+1)
=1.6×10
=16
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