题目内容
| 列竖式计算. (1)0.5×22= |
(2)6×0.23= | (3)5.24×82 |
| (4)0.21×0.48= | (5)0.95×0.074= | (6)0.25×0.24= |
| (7)29.61÷7= | (8)9.64÷4= | (9)45.15÷15= |
| (10)0.72÷0.24= | (11)1.5÷0.03= | (12)4.8÷0.24= |
分析:本题根据小数乘法与除法的运算法则列竖式计算即可.
解答:解:(1)0.5×22=11;
(2)6×0.23=1.38;
(3)5.24×82=429.68;
(4)0.21×0.48=0.1008;
(5)0.95×0.074=0.0703;
(6)0.25×0.24=0.06;
(7)29.61÷7=4.23;
(8)9.64÷4=2.41;
(9)45.15÷15=3.05;
(10)0.72÷0.24=3;

(11)1.5÷0.03=50;

(12)4.8÷0.24=20;

|
. |
| 1 1 .0 |
(2)6×0.23=1.38;
|
. |
| 1.3 8 |
(3)5.24×82=429.68;
|
. |
| 1 0 4 8 |
| 4 1 9 2 |
| 4 2 9.6 8 |
(4)0.21×0.48=0.1008;
|
. |
| 1 6 8 |
| 8 4 |
| 0.1 0 0 8 |
(5)0.95×0.074=0.0703;
|
. |
| 3 7 0 |
| 6 6 6 |
| 0.0 7 0 3 0 |
(6)0.25×0.24=0.06;
|
. |
| 1 0 0 |
| 5 0 |
| 0.0 6 0 0 |
(7)29.61÷7=4.23;
|
| 2 8 |
| 1 6 |
| 1 4 |
| 2 1 |
| 2 1 |
| 0 |
(8)9.64÷4=2.41;
|
| 8 |
| 1 6 |
| 1 6 |
| 4 |
| 4 |
| 0 |
(9)45.15÷15=3.05;
|
| 4 5 |
| 1 5 |
| 1 5 |
| 0 |
(10)0.72÷0.24=3;
(11)1.5÷0.03=50;
(12)4.8÷0.24=20;
点评:在列竖式完成小数乘除法算式时,要注意小数点位置的变化.
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