1.5﹣1.05=
0.125×8=
80÷25%=
2.33+6.67=
28÷0.01=
﹣=
56×=
20%﹣=
3.14×6=
120cm:2.4m=
: =7:5
0.8a+a=
0.25×5×4=
(﹣)×30=
+÷=
×÷×=