用简便方法计算:4.86×1.24－48.6×0.024 2.9×(9.3－5.7)+36÷10

4.86×1.24－48.6×0.024
=4.86×1.24-4.86×0.24
=4.86×（1.24-0.24）
=4.86×1
=4.86
2.9×(9.3－5.7)+36÷10
=2.9×3.6+3.6
=3.6×（2.9+1）
=3.6×3.9
=3.6×（4-0.1）
=3.6×4-3.6×0.1
=14.4-0.36
=14.04

4.86×1.24－48.6×0.024
=4.86×1.24－4.86×0.24
=4.86×(1.24－0.24)
=4.86×1
=4.86

2.9×(9.3－5.7)+36÷10
=2.9×3.6+3.6
=3.9×3.6
=14.04

1、原式＝4.86*1.24-4.86*0.24＝4.86*（1.24-0.24）＝4.86*1＝4.86

2、原式＝2.9*3.6+3.6＝（2.9+1）*3.6＝3.9*3.6＝3.6*（4-0.1）＝3.6*4-0.36＝14.4-0.36＝14.04

4.86×1.24－48.6×0.024
=4.86×1.24－4.86×0.24
=4.86×（1.24－0.24）
=4.86