161乘以18乘以2的简便计算?
4个回答
展开全部
161×18×2
=161×36
=161×40-161×4
=6440-644
=6440-700+56
=5796
=161×36
=161×40-161×4
=6440-644
=6440-700+56
=5796
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展开全部
原式=(100+60+1)x18x2
=100x18x2+60x18x2+36
=100x36+60x36+36
=3600+(50+10)x36+36
=3600+50x36+10x36+36
=3600+1800+360+36
=5400+360+36
=5760+36
=5796
=100x18x2+60x18x2+36
=100x36+60x36+36
=3600+(50+10)x36+36
=3600+50x36+10x36+36
=3600+1800+360+36
=5400+360+36
=5760+36
=5796
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