题目内容
口算.
|
(1) |
(2) |
|
28 +86= |
270 +280= |
|
100 -37= |
510 -130= |
|
47 +66= |
880 -490= |
|
80 -51= |
340 +160= |
|
(3) |
(4) |
|
600 -6= |
501 -4= |
|
600 -60= |
894 +7= |
|
439 +8= |
607 -9= |
|
430 +80= |
488 +8= |
答案:114,63,113,29;550,380,390,500;594,540,447,510;497,901,598,496
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