12.5×(0.8×0.6)=12.5×0.8 。
①2.8×3.6+1.4×2.8
②4.75×101
③3.17×1.2+1.83
④4.95-14.82÷7.6
⑤12.5×16×2.5
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﹣(+)
①26×15﹣200
②8×4×12.5×0.25
③×+
④12÷[()×]