3个回答
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l02x52-25x2
=(100-2)x(50+2)-50
=100x50+200-100-4-50
=5100-54
=5046
=(100-2)x(50+2)-50
=100x50+200-100-4-50
=5100-54
=5046
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展开全部
102×52-25×2
=102×(50+2)-50
=102×50+102×2-50
=(102-1)×50+204
=101×50+204
=5050+204
=5254
52×102-52×2
=52×(102-2)
=52×100
=5200
=102×(50+2)-50
=102×50+102×2-50
=(102-1)×50+204
=101×50+204
=5050+204
=5254
52×102-52×2
=52×(102-2)
=52×100
=5200
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