8.4×3.6+1.28+0.96×0.5怎么用简便算法算_数学解答

8.4×3.6+1.28+0.96×0.5怎么用简便算法算

人气：480 ℃　时间：2020-05-15 21:38:40

解答

8.4×3.6+1.28+0.96×0.5
=0.4×21×0.4×9+0.16×8+0.16×6×0.5
=189×0.16+0.16×(8+3)
=0.16×(189+11)
=0.16×200
=32