19+23=
5﹣1.6=
0.23÷0.1=
0.4×0.2=
=
÷0.25=
1÷0.05= 9.7+0.03= 1-1÷9= 12×( + )=
× = + = 0.6÷ = 2÷1%=
0.48÷0.3= 36- = 2.5×40= ×(15+ )=
684+198= 12×1%= × = ×9÷ =
+1 ÷1 8.99×9.9990