25×0.134×4
10.1×18
①3.14×101
②
③
④
⑤0.45×16÷1.5
﹣+ ﹣(+) +﹣+ .
+- 3-- 0.25×0.4+0.25×0.4 ++++
12-5÷12- 1--
12.45+-3.45+ -(+)
+3.2++1.8
10-- 9.8×2.19-9.8×1.19 -