28x52+28ⅹ48如何巧算?
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42x68+28x48怎样巧算
=42*68+28*(42+6)
=42*68+28*42+28*6
=42*(68+28)+168
=42*96+168
=42*(100-4)+168
=42*100-42*4+168
=4200-168+168
=4200
=42*68+28*(42+6)
=42*68+28*42+28*6
=42*(68+28)+168
=42*96+168
=42*(100-4)+168
=42*100-42*4+168
=4200-168+168
=4200
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展开全部
42x68+28x48怎样巧算
=42*68+28*(42+6)
=42*68+28*42+28*6
=42*(68+28)+168
=42*96+168
=42*(100-4)+168
=42*100-42*4+168
=4200-168+168
=4200
=42*68+28*(42+6)
=42*68+28*42+28*6
=42*(68+28)+168
=42*96+168
=42*(100-4)+168
=42*100-42*4+168
=4200-168+168
=4200
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你对这个回答的评价是?
展开全部
42x68+28x48怎样巧算
=42*68+28*(42+6)
=42*68+28*42+28*6
=42*(68+28)+168
=42*96+168
=42*(100-4)+168
=42*100-42*4+168
=4200-168+168
=4200
=42*68+28*(42+6)
=42*68+28*42+28*6
=42*(68+28)+168
=42*96+168
=42*(100-4)+168
=42*100-42*4+168
=4200-168+168
=4200
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你对这个回答的评价是?
展开全部
42x68+28x48怎样巧算
=42*68+28*(42+6)
=42*68+28*42+28*6
=42*(68+28)+168
=42*96+168
=42*(100-4)+168
=42*100-42*4+168
=4200-168+168
=4200
=42*68+28*(42+6)
=42*68+28*42+28*6
=42*(68+28)+168
=42*96+168
=42*(100-4)+168
=42*100-42*4+168
=4200-168+168
=4200
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28x52+28x48
=28x(52+48)
=28x100
=2800
=28x(52+48)
=28x100
=2800
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