Question

38.5-5.38+61.5-4.62的简便运算？

有几种简便算法

Answer 1

38.5-5.38+61.5-4.62
=38.5+61.5-(5.38+4.62)
=100-10
=90

Answer 2

38.5-5.38+61.5-4.62
＝（38.5+61.5）-（5.38+4.62）
＝100-10
＝90

Answer 3

38.5-5.38+61.5-4.62
=38.5+61.5-4.62-5.38
=100-10
=90

Answer 4

38.5-5.38+61.5-4.62
=（38.5+61.5）-（5.38+4.62）
=100-10
=90

Answer 5

38.5-5.38+61.5-4.62
=(38.5+61.5)-(5.38+4.62)
=100-10
=90