题目内容
| 口算 32×20= |
120÷40= | 450÷90= |
| 80-51= | 65+25= | 630÷70= |
| 12×6= | 19×4= | 30×13= |
| 78÷3= | 65÷13= | 80×50= |
分析：根据整数加减乘除法的计算方法进行计算．
解答：解：
| 32×20=640 | 120÷40=3 | 450÷90=5 |
| 80-51=29 | 65+25=90 | 630÷70=9 |
| 12×6=72 | 19×4=76 | 30×13=390 |
| 78÷3=26 | 65÷13=5 | 80×50=4000 |
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
口算
| 32×100= | 1-0.26= | 15+0.5= | 6-0.43= |
| 4.5+5.5= | 6.2-0.7= | 2.3+4.7= | 29+56= |
| 1.4+0.8= | 0.48-0.18= | 5.6+3= | 64÷8×9= |
| 230×30= | 280÷20= | 9.3÷100= | 36+24-12= |
口算。
|
口算题
|
+
=
=
-
=
÷
=
+
=
×
=
÷
=
=（ ）%
×
=
=（ ）%
×
=
≈（ ）%
+
=
=
-
=
×
=
=
=