题目内容
+
-
-
解:
+
=
+
=
;
-
=
-
=
;
-
=
-
=
.
分析:先通分,再根据同分母分数相加减的方法计算.
点评:本题考查了基本的分数加减法的运算,运算的结果要化成最简分数.
分析:先通分,再根据同分母分数相加减的方法计算.
点评:本题考查了基本的分数加减法的运算,运算的结果要化成最简分数.
练习册系列答案
相关题目
| 3.2+4.8= | 6.3-0.94= | 0.25×4= | 5×1.2= |
| 4.8÷0.6= | 4.8÷24= | 3.6-2.4= | 6-4.6= |
| 8-3.4= | 6×0.21= | 1.25×8= | 0.8÷0.5= |
| 25×0.3= | 0.63-0.3= | 2.5+7.5= | 34×0.1= |
| 7-0.99= | 21÷0.7= | 5×2.4= | 3×1.03= |
| 3.2÷4= | 1.5÷30= | 5.1÷3= | 0.37÷0.37= |
| 0.28÷14= | 0.16÷4= | 8×0.05= | 4×0.125= |
| 4÷8= | 7.5-0.7= | 9-0.9= | 7÷2= |
| 2.8÷0.7= | 21-0.21= | 5÷0.01= | 2.8×0= |
| 7÷0.07= | 6.3÷0.5= | 0.32÷0.8= | 1÷0.25= |
| 0.25×0.4= | 30×2.3= | 3.6÷1.2= | 2.5+1.2= |
| 3.5×0.2= | 9÷0.45= | 0.96÷0.16= | 4.8-2.9= |
| 0.5÷0.25= | 7.6+2.4= | 0.17×0.4= | 8.2×0.01= |
| 1.72-0.73= | 0.46÷2= | 1.9×0.8= | 1.2×0.3= |
| 1-0.92= | 0.16×0.7= | 0.56÷0.16= | 8÷0.6= |
笑笑统计了全班同学的鞋码,并记录如下:
| 鞋码 | 18 | 19 | 20 | 21 | 22 | 23 |
| 人数 | 6 | 10 | 7 | 8 | 12 | 2 |
②鞋码为19码或21码的可能性比