+=________
3.5+6=________
2-=________
-=________
-=________
-=________
0.2-=________
0.3+=________
×4=________
×=________
×________
15×1=________
×=________
0÷=________
24÷=________
÷=________
÷1=________
÷=________
÷=________
9+=________
12π=________
0.4×3.14=________
0.92=________
2.5×3.4=________
28÷=________．
网友回答
10 3 25 0 32 37.68 1.256 0.81 8.5 42
解析分析：利用分数的四则混合运算顺序进行计算，计算中适时的利用小数和分数的互化．
解答：+=???? 3.5+6=10????? 2-=?????? ? -=?????? -=
-=???????? 0.2-=???? ?0.3+=?????? ×4=3????? ? ?×=
× ????? 15×1=25?????? ×=????? 0÷=0??????? ?24÷=32
÷=??????? ÷1=???? ?÷=????? ÷=??????? 9+=
12π=37.68???? 0.4×3.14=1.256? ? ?0.92=0.81????? 2.5×3.4=8.5?????? 28÷=42．
点评：此题考查了按分数的四则混合运算顺序进行计算．