+42=80 -35=63 20×=160
*807÷23= 10.23-6.7=
7.5 -4.3 =
2.18+6.72=
13.5-1.5=
0.47 +6=
9.6 -3.5 =
6.3+3.6=
0.95-0.32 =
2.4+7.3=
65500006506000 998000051亿
45×(20+1)45×20+1 462-98462-100+2