①6.5-0.5×2.5
②36.8÷4÷25
③4.6×10.1
④37.5-7.5×(0.4+1.6)
⑤5.2×13.7+8.63×52
+= ×= -= ÷=
0.18×= 4.7+0.38= 3.2÷0.1= (10﹣)×0=
①-+-
②×+÷
③(6﹣1.3×4)÷0.1
④0.4×0.25×8×125
⑤3.4÷[(1.25+0.45)×23]