3.6×202 2.65-0.5×0.5=
4×0.8×1.25×0.25 9.5×90+95
①16.4÷25÷4
②6.9×3.6+3.6×3.1
③14.4+1.25÷0.5
④(16.8+4.9)÷0.7
①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1
①25×32×1.25
②(+0.375)÷(×)
③×+÷7
④6﹣(+)