| 0.83+0.27= | 2.9×100= | 50÷1000= |
| ________×10=0.7 | 80÷________=0.8 | + = |
| 5.6+4= | 0.13×1000= | -0.35= |
分析:根据小数和分数加减乘除的计算方法进行计算.
解答:
| 0.83+0.27=1.1, | 2.9×100=290, | 50÷1000=0.05, |
| 0.07×10=0.7, | 80÷100=0.8, | + =0.37, |
| 5.6+4=9.6, | 0.13×1000=130, | -0.35=0.56. |
点评:口算时,注意运算符号和数据,然后再进一步计算.
+
=
-0.35=