210x42x6简便计算方法?
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210×42×6
=210×7×6×6
=1470×36
=1470×(40-4)
=1470×40-1470×4
=58800-5880
=52920
=210×7×6×6
=1470×36
=1470×(40-4)
=1470×40-1470×4
=58800-5880
=52920
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展开全部
210×42×6
=210×21×2×6
=210×21×12
=210×(20+1)×12
=(4200+210)×12
=4410×12
=4410×(10+2)
=44100+8820=52920
=210×21×2×6
=210×21×12
=210×(20+1)×12
=(4200+210)×12
=4410×12
=4410×(10+2)
=44100+8820=52920
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展开全部
210×42×6
=210×7×6×6
=1470×36
=1470×(40-4)
=1470×40-1470×4
=58800-5880
=52920
=210×7×6×6
=1470×36
=1470×(40-4)
=1470×40-1470×4
=58800-5880
=52920
追答
210×42×6
=210×7×6×6
=1470×36
=1470×(40-4)
=1470×40-1470×4
=58800-5880
=52920
210×42×6
=210×7×6×6
=1470×36
=1470×(40-4)
=1470×40-1470×4
=58800-5880
=52920
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评论
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210x42ⅹ6
=[(200+10)ⅹ42]x6
=[200x42+10x42]x6
=[8400+420]ⅹ6
=8820ⅹ6
=52920
=[(200+10)ⅹ42]x6
=[200x42+10x42]x6
=[8400+420]ⅹ6
=8820ⅹ6
=52920
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展开全部
210x42ⅹ6
=[(200+10)ⅹ42]x6
=[200x42+10x42]x6
=[8400+420]ⅹ6
=8820ⅹ6
=52920
=[(200+10)ⅹ42]x6
=[200x42+10x42]x6
=[8400+420]ⅹ6
=8820ⅹ6
=52920
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评论
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你对这个回答的评价是?
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