61x42-61x21-61x11简便运算怎么算?
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61x42-61x21-61x11
=61x(42-21-11)
=61x10
=610
=61x(42-21-11)
=61x10
=610
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展开全部
61x42-61x21-61x11
=61x(42-21-11)
=61x(21-11)
=61x10
=610
=61x(42-21-11)
=61x(21-11)
=61x10
=610
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2022-07-10
展开全部
61x42-61x21-61x11简便运算怎么算
61x42-61x21-61x11
=61x(42-21-11)
=61x(21-11)
=61x10
=610.
61x42-61x21-61x11
=61x(42-21-11)
=61x(21-11)
=61x10
=610.
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