①57.6﹣18.15+32.4﹣11.85
②78×25+1764÷49
③2.5×32×12.5
④3.6×[(37.5+18.5)÷2.8]
⑤÷[(﹣)×]
⑥199×99+178+21
0.125×16= 1.04×5= 7×12÷7×120=
18.8×20%= ×0.55= 123+﹣123+=
+= ﹣= 3.5×= 2÷0.5=