巧算:230/25/4x8400/23/42

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巧算:230/25/4x8400/23/42巧算:230/25/4x8400/23/42巧算:230/25/4x8400/23/42230除以25除以4乘以8400除以23除以42=230/23*84

巧算:230/25/4x8400/23/42
巧算:230/25/4x8400/23/42

巧算:230/25/4x8400/23/42
230除以25除以4乘以8400除以23除以42
=230/23*8400/42*1/(25*4)
=10*200/100
=20