①250-250÷25×2
②18÷ ×
③5.2÷0.4÷2.5
④(34- )÷17
⑤4.3×1.75-1.75+ ×6.7
⑥ ×[(72.8-69.6)÷ ]
57﹣30=
15×4=
4.2÷7=
39+71=
24×5= + = 4﹣1.6= 3.14×32=
25×4+25×4= 0+ = +7= × =
2.7+5.4= ﹣ × =
①3.6﹣2.8+7.4﹣7.2
②1.25×1.6×25
③÷4
④÷[(﹣)×]
(得数保留两位小数)