题目内容
| 先用竖式计算,再用计算器验算. 280×16= | 36×242= | 420×50= |
| 48×320= | 57×198= | 406×80= |
(1)280×16=4480;

验算:4480÷280=16
(2)36×242=8712;

验算:8712÷242=36
(3)420×50=21000;

验算:21000÷420=50
(4)48×320=15360;

验算:15360÷320=48
(5)57×198=11286;

验算:11286÷198=57
(6)406×80=32480.

验算:32480÷406=80
验算:4480÷280=16
(2)36×242=8712;
验算:8712÷242=36
(3)420×50=21000;
验算:21000÷420=50
(4)48×320=15360;
验算:15360÷320=48
(5)57×198=11286;
验算:11286÷198=57
(6)406×80=32480.
验算:32480÷406=80
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