①×÷
②÷6+×
③(+)÷
① × ×3
②87×
③ - ×
④ ÷ ×
⑤3.7× +1.3÷
⑥ ÷(3- - )
+×69
()×42
101×
0.2×45= 3﹣= 10×25%= 32×0×3.08=
+= 0.5+= = (120﹣70)÷=