简便计算9.9x8.6+0.86=?

2025-02-24 04:53:47
推荐回答(5个)
回答1:

9.9x8.6+0.86=9.9x8.6+0.1*8.6=(9.9+0.1)*8.6=86

回答2:

9.9x8.6+0.86
=9.9×8.6+(0.1×8.6)
=8.6×(9.9+0.1)
=8.6×10
=86

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回答3:

(10-0.1)*8.6+0.86=10*8.6-0.1*8.6+0.86=86

回答4:

=(10-0.1)*8.6+0.86
=10*8.6-0.1*8.6-0.86
=86

回答5:

(9.9+0.1)*8.6=86