(1)274+156________274-156???8×9________8×9×2(2)543-210________643-210???459+136____

发布时间:2020-07-31 05:22:03

(1)274+156________274-156???8×9________8×9×2(2)543-210________643-210???459+136________459+163(3)142+127________227+42???350+150________350+0(4)348-256________348-156?? 81÷9________72÷8.

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解:(1)274+156>274-156???8×9<8×9×2(2)543-210<643-210???459+136<459+163(3)142+127=227+42???350+150>350+0(4)348-256<348-156?? 81÷9=72÷8.故
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