Question

简便运算

Answer 1

=(5.77-0.01)×1.1+5.77×10×0.89
=5.77×1.1-0.01×1.1+5.77×8.9
=5.77×(1.1+8.9)-0.011
=5.77×10-0.011
=57.7-0.011
=57.689

Answer 2

5.76x1.1+57.7x0.89
=5.76×1.1+5.77×8.9
=（5.77-0.01）×1.1+5.77×8.9
=5.77×1.1-0.01×1.1+5.77×8.9
=5.77×(1.1+8.9)-0.01×1.1
=5.77×10-0.011
=57.7-0.011
=57.689

Answer 3

5.76x1.1 + 57.7x0.89
=57.6x0.11 + 57.7x0.89
=57.6x0.11 + 57.6x0.89 + 0.1x0.89
=57.6x(0.11 + 0.89) + 0.089
=57.689

Answer 4

原式=（0.89+0.11）乘57.7-〔0.11乘（57.7-57.6）〕=57.7-0.011=56.989

Answer 5

=5.76*1.1+57.7*(1-0.11)=5.76*1.1+57.7-57.7*0.11=5.76*1.1+57.7-5.77*1.1=(5.76-5.77)*1.1+57.7=-0.01*1.1+57.7=-0.011+57.7=57.689