71*99 简便运算高手来简便运算
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71*99 简便运算
高手来简便运算
71*99
=71*(100-1)
=71*100-71
=7100-71
=7029
71*(100-1)=7100-71
=7023
71*(100-1)
=7100-71
=7029
71*99
=71*(100-1)
=7100-71
=7029
71*99 简便运算
高手来简便运算
71*99
=71*(100-1)
=71*100-71
=7100-71
=7029
71*(100-1)=7100-71
=7023
71*(100-1)
=7100-71
=7029
71*99
=71*(100-1)
=7100-71
=7029