发布人:繁体字网(www.fantiz5.com) 发布时间:2015-10-24 07:30:00
试题原文 |
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(1)722-301, =700+22-(300+1), =700-300+(22-1), =400+21, =421; (2)235-190+165, =(235+165)-190, =400-(200-10), =400-200+10, =210; (3)986-169-131, =986-(169+131), =986-300, =686; (4)167+141+359+33, =(167+33)+(141+359), =200+500, =700; (5)425+438+175, =(425+175)+438, =600+438, =1038; (6)463-148, =440+23-(140+8), =(440-140)+(23-8), =300+15, =315. |
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