题目内容
列竖式计算并验算.
(1)30.5-1.8=
(2)0.49+4.7=
(1)30.5-1.8=
(2)0.49+4.7=
(1)30.5-1.8=28.7;
30.5
-1.8
验算:
28.7
+1.8
(2)0.49+4.7=5.19.
0.49
+4.7
验算:
5.19
-4.7
30.5
-1.8
| . |
| 28.7 |
验算:
28.7
+1.8
| . |
| 30.5 |
(2)0.49+4.7=5.19.
0.49
+4.7
| . |
| 5.19 |
验算:
5.19
-4.7
| . |
| 0.49 |
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