- = + - + =
43= 0.25÷2.5= 0.62=
3.14×4=
100×80%=
105%+50%=
3.14×9=
7×÷7×=
×=
÷=
1-75%=
0.1÷10%=
-= -=
+= +=
+= 2-=
- = - = + = 3- =
12+ = + = 0.75+ = - =
0.25+1.5= 1.03+2.7= 16.6-12.31= 1.6×5=
+ = + = - = 3- =
×2= 2- = × = 0× = + + =
28× = - = 1- - = 69× = 7- =
①(++)×30
②7.2×99+7.2
③(+)×7+
④×153﹣0.6×53
⑤×+÷5+
⑥×[﹣(﹣)]