0.2(-)0.2(+)0.2(-)0.2 =0
0.2(+)0.2(-)0.2(+)0.2 =0.4
0.2(+)0.2(+)0.2(+)0.2 =0.8
0.2(÷)0.2(×)0.2(÷)0.2 =1
得0.2的不好做,需要括号:0.2 + 0.2 × ( 0.2 - 0.2)
0.2(-)0.2(+)0.2(-)0.2 =0
0.2(+)0.2(-)0.2(+)0.2 =0.4
0.2(+)0.2(+)0.2(+)0.2 =0.8
0.2(÷)0.2(×)0.2(÷)0.2 =1
得0.2的不好做,需要括号:0.2 + 0.2 × ( 0.2 - 0.2)