6.5÷100= 4.8×0.1= 5÷7= 0.5×40=
- = + = 0.5+ = 0.75- =
0.75-=
-=
+=
1-+=
5-=
1-3÷8=
++=
1- = + = ×2= + = - =
18× = ÷6= ÷ = a-0.4a= + + + =
2+□=8
10+□=14