计算4.8-2.3=（）7.1+1.1=（）3+

计算7g6|'D/u't5\0W5H-r4f5p;C.k,x)G1e

4.8-2.3=)t8W1]3F3t/i2P7g6|'D/u't5\0W5H-r4f5p;C.k,x)G1e

7.1+1.1=-t7M-G7]8q8S9m(b1g'q*z7g6|'D/u't5\0W5H-r4f5p;C.k,x)G1e

3+7.4=;y5q1[5r7}.b4?)f8B9M;X7?8o8x7g6|'D/u't5\0W5H-r4f5p;C.k,x)G1e

6.6-3=;@(W,L8n)r7g6|'D/u't5\0W5H-r4f5p;C.k,x)G1e

205+30.5=0J/K,K/P8c5o5L+o7g6|'D/u't5\0W5H-r4f5p;C.k,x)G1e

100-99.8=,j.l+Z.[0t4m-u-h.h-Z4d0N4o6Q7A;I7g6|'D/u't5\0W5H-r4f5p;C.k,x)G1e

28.7-5.7=-q(?3A-Y7g+Z*o9q;I7g6|'D/u't5\0W5H-r4f5p;C.k,x)G1e

7.3+2.7=;y4m7e*Y7g6|'D/u't5\0W5H-r4f5p;C.k,x)G1e