5.7*9.9+0.57的简便算法

2025-02-25 11:07:49
推荐回答(4个)
回答1:

5.7×9.9+0.57
=5.7×9.9+5.7×0.1
=5.7×(9.9+0.1)
=5.7×10
=57

回答2:

5.7X9.9+0.57
=0.57X(99+1)
=0.57X100
=57

回答3:

5.7*9.9+0.57=5.7*9.9+5.7*0.1=5.7*(9.9+0.1)=5.7*10=57

回答4:

5.7x9.9+0.57
=5.7x9.9+5.7x0.1
=5.7x(9.9+0.1)
=5.7x10=57