题目内容
| 3×3.14= | 0.32= |  = |
 = |  = | 11×3.14= |
 = | 4.52= | 25-8.6= |
 = |  = |
解：
| 3×3.14=9.42， | 0.32=0.09， | = ， |
= ， | =81， | 11×3.14=34.54， |
= ， | 4.52=20.25， | 25-8.6=16.4， |
| =9， | =2 ． |
分析：根据小数和分数加减乘除的计算方法进行计算；
根据乘法分配律进行简算．点评：口算时，注意运算符号和数据，然后再进一步计算．
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= |
| 180÷60= | 12×25= | 0÷90= |
| 4×5÷4×5= | 0.25×4+4= | 131+218+269+182= |
| 25×6×4= | 420÷35= | 36×5×4= |
| 120÷5÷3= | 198-75-25= | 120-20÷5= |
| 59亿-58亿= | （1.3+3.5）÷0.6= | 75÷2.5= |
| 0.45÷1.25÷8= | 2.5×7.6×4= | 97.6÷0.02= |
| 8.8-（0.25+0.4）= | 0.25+87+0.75= | 0.8-0.35×2= |
| 0.1÷0.01×0.1= | 9.9+9.9×99= | 2.7×3.6+6.4×2.7= |
| 720÷8÷9= | 2.9+5.7+2.1= | 2-0.16-0.64= |
| 16.7+84.5-16.7= | 6.8-（3.8+2.9）= | 9×1.3+9×6.7= |
| 5.5-5.25+5.2= | 0.8×25-10= | 42.8×25×4= |
| 7.2+2.8= | 0.9÷0.01= | 3.5+7.6= |
| 3×0.2×0.5= | 0.96÷0.3= | 1.5×0.4= |
| 7÷0.25= | 2.5×0.7×0.8= | 8-2.5= |
| 16÷1.6= | 5.6×1.01= | 8×（2.5+0.25）= |
| 0.36+0.64= | 64.32÷16= | 72.8÷0.8= |
| 8.4×0.2+1.6×0.2= | 8.4÷4.2= | 0.05×0.8= |
| 2.56-0.37= | 1.23×3= | 25×0.8×0.5= |
| 12×2.5= | 3.2÷1.6= | 3.5+3.5×3= |
| 19.6÷2= | 8.8÷2.2= | 3.9+2.03= |
| 7.2×0.3+2.8×0.3= | 13.8+9.9= | 2.4×2.5= |
| 0.75×4= | （1.5+0.25）×4= | 4.2÷0.1= |
| 4.2÷3.5= | 2.14-0.9= | 27+456+73= |
| 12÷0.3= | 2.87÷0.7= | 13÷4= |
| 24÷4+56÷4= | 2.1×0.3÷2.1= | 2.3-0÷8.1= |
| 1.37-1.37÷1.37= | 4.4÷（5×0.2）= | 7×1.3= |
| 0.96÷0.06= | 0.36×0.3= | 0.35÷0.7= |
| 13.65÷13= | 4×0.8×0.25×1.25= | 13+0.7÷0.7= |
| 7.05×23.7+7.05×76.3= | 0.125×3.2×2.5= | （12+23.1÷0.75）×0.4-5.12= |
| 728+199= | 637-201= | 16×25= |
| 1.6×[（12-7.2）÷（0.84÷2.1）]= |