奥数五年88.9x61.5十55.5Ⅹ12.3怎么样做? 5
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61.5=12.3×5
88.9×61.5+55.5×12.3
=88.9×61.5+11.1×5×12.3
=61.5×(88.9+11.1)
=61.5×100
=6150
望采纳,谢谢!
88.9×61.5+55.5×12.3
=88.9×61.5+11.1×5×12.3
=61.5×(88.9+11.1)
=61.5×100
=6150
望采纳,谢谢!
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这道题可以这样做:
88.9×61.5+55.5×12.3
=88.9×61.5+11.1×5×12.3
=88.9×61.5+11.1×61.55
=(88.9+11.1)×61.5
=100×64.5
=6450
88.9×61.5+55.5×12.3
=88.9×61.5+11.1×5×12.3
=88.9×61.5+11.1×61.55
=(88.9+11.1)×61.5
=100×64.5
=6450
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61.5=12.3×5
88.9×61.5+55.5×12.3
=88.9×61.5+11.1×5×12.3
=61.5×(88.9+11.1)
=61.5×100
=6150
望采纳,谢谢!
88.9×61.5+55.5×12.3
=88.9×61.5+11.1×5×12.3
=61.5×(88.9+11.1)
=61.5×100
=6150
望采纳,谢谢!
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已踩过<
评论
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你对这个回答的评价是?
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88.9×61.5+55.5×12.3
=88.9×61.5+11.1×61.5
=(88.9+11.1)×61.5
=l00×61.5
=6l50
=88.9×61.5+11.1×61.5
=(88.9+11.1)×61.5
=l00×61.5
=6l50
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61.5=5×12.3
88.9×61.5+55.5×12.3
=88.9×61.5+11.1×(5×12.3)
=88.9×61.5+11.1×61.5
=(88.9+11.1)×61.5
=100×61.5
=6150
88.9×61.5+55.5×12.3
=88.9×61.5+11.1×(5×12.3)
=88.9×61.5+11.1×61.5
=(88.9+11.1)×61.5
=100×61.5
=6150
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评论
收起
你对这个回答的评价是?
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