25%×99+25%
19.3-(9.3+4.55)
51× 36×72+2.8×360
①12×[432÷(42-18)]
②
③
④3.6×2.5+6.4×2.5
⑤2.3×1.2+4.5÷0.75
⑥
①5.8﹣1.9﹣2.1
②×2.5××4
③÷(﹣)×
④83×0.75+17÷
①
②7.5×8×12.5
④193﹣16﹣84
①25×32×1.25
②(+0.375)÷(×)
③×+÷7
④6﹣(+)