27+=80 35-=17 39-12=+12
-6=46 +12=30 45-15=-20
66+30= 22+62= 3×4= 93-46= 4×3=
95-33= 4+28= 4×2= 61-38= 5×5=
4×4-2= 57-34+55= 5×3+16= 81+11+1=
①101×9.9
②44﹣72÷
③36×()
④÷[(﹣)×3]
⑤95×3.8+6.2÷
⑥0.25×40÷0.25×40