Question

33.28-18.41-21.59+26.72的简便方法？

请各位学霸解答很急

Answer 1

因为8+2=10，1+9=10所以先凑十在计算。
33.28+26.72-（21.59+18.41）=60-40=20

Answer 2

移项
33.28+26.72-（18.41+21.59）=60-40=20

Answer 3

（33.28+26.72）-（18.41+21.59）=60-40 = 20

Answer 4

原式＝(33.28＋26.72)－(18.41＋21.59)
＝60－40
＝20

Answer 5

（33.28+26.72）-（18.41+21.59）=20