26×67+33×66的巧算方法?
21个回答
展开全部
解: 33X77+66X11
=33X7X77/7+66X11
=231X11+66X11
=11X(231+66)
=(10+1)X297
=2970+297
=2970+(300-3)
=3270-3
=3267
=33X7X77/7+66X11
=231X11+66X11
=11X(231+66)
=(10+1)X297
=2970+297
=2970+(300-3)
=3270-3
=3267
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展开全部
解: 33X77+66X11
=33X7X77/7+66X11
=231X11+66X11
=11X(231+66)
=(10+1)X297
=2970+297
=2970+(300-3)
=3270-3
=3267
=33X7X77/7+66X11
=231X11+66X11
=11X(231+66)
=(10+1)X297
=2970+297
=2970+(300-3)
=3270-3
=3267
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展开全部
解: 33X77+66X11
=33X7X77/7+66X11
=231X11+66X11
=11X(231+66)
=(10+1)X297
=2970+297
=2970+(300-3)
=3270-3
=3267
=33X7X77/7+66X11
=231X11+66X11
=11X(231+66)
=(10+1)X297
=2970+297
=2970+(300-3)
=3270-3
=3267
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展开全部
26×67+33×66
= 26×66 + 26 +33×66
= (26+33)×66 + 26
= 60×66 - 66 + 26
= 3960 - 40
= 3920
= 26×66 + 26 +33×66
= (26+33)×66 + 26
= 60×66 - 66 + 26
= 3960 - 40
= 3920
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展开全部
=26*(66+1)+33*66
=(26+33)*66+26=(59+1)*66-66+26=60*66-40
=(26+33)*66+26=(59+1)*66-66+26=60*66-40
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