0.7*99+0.77怎样简算

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0.7*99+0.77怎样简算0.7*99+0.77怎样简算0.7*99+0.77怎样简算答:0.7*99+0.77=0.7*99+0.7+0.07=0.7*(99+1)+0.07=0.7*100+0

0.7*99+0.77怎样简算
0.7*99+0.77怎样简算

0.7*99+0.77怎样简算
答:0.7*99+0.77
=0.7*99+0.7+0.07
=0.7*(99+1)+0.07
=0.7*100+0.07
=70+0.07
=70.07

0.7×99+0.77
=0.7×99+(0.7×1.1)
=0.7×99+(0.7×1+0.7×0.1)
=0.7×(99+1)+0.7×0.1
=70+0.07
=70.07

0.7×99+0.77=0.7×99+0.7+0.07
=0.7×(99+1)+0.07
=0.7×100+0.07
=70+0.07=70.07