18.5×301 2.33×5×4 0.3×0.6×24
(8-0.8)×125 3.65-2.2×1.1 3.7×0.15+4.02
5.4+4.6÷0.2 0.8×0.4×1.25×2.5 9.75÷1.5+9.75÷2.5
8.9×10.1 3.6×6.5+36×0.45-3.6
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÷[()×]