75×13×8怎样简便运算?要有经过.急.

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75×13×8怎样简便运算?要有经过.急.
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75×13×8怎样简便运算?要有经过.急.
75×13×8怎样简便运算?要有经过.急.

75×13×8怎样简便运算?要有经过.急.
25x3x13x4x2
=25x4x(2x3x13)
=100x78
=7800

75x13x8=25x3x13x4x2
=(25x4)x(2x3x13)
=100x(6x13)
=100x78
=7800.