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)0.25×(4+0.4)+0.9, =0.25×4+0.25×0.4+0.9, =1+0.1+0.9, =1+(0.1+0.9), =2; (2)0.89×1.25-0.09×1.25, =1.25×(0.89+-0.09), =1.25×0.8, =1; (3)104×0.25, =(100+4)×0.25, =100×0.25+4×0.25, =25+1, =26; (4)40×0.625+0.375×40, =(0.625+0.375)×40, =1×40, =40. |
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