7.7*6.7+6.7*7.6*99简便算法
问题描述:
7.7*6.7+6.7*7.6*99简便算法
答
原式=(0•1+7•6)x6•7+6•7x7•6x99
=0•1x6•7+7•6x6•7+6•7x7•6x99
=0•1x6•7+7•6x6•7(1+99)
=0•1x6•7+7•6x6•7x100
=0•01x67十76x67
=67x76•01
=5092•67。
答
7.7*6.7+6.7*7.6*99=0.1*6.7+7.6*6.7+6.7*7.6*99=0.1*6.7+7.6*6.7(1+99)=6.7*(0.1+760)=5092.67
答
原式=1*7.6*6.7+7.6*6.7*99
=(1+99)*7.6*6.7
=100*7.6*6.7
=5092