6.3+7=
1-0.01=
15×0.01=
5÷9=
2.4+0.76=
8.2÷0.1=
a+1.4a=
0.62=
-= -=
+= +=
+= 2-=
+3= ×16= + = × =
×6= 2- = 60× = - =
① ②