÷2=+=6.3÷0.01=4--=÷=390×0.02=0.9-0.26=4×÷4×=

发布时间:2020-08-09 18:52:55

÷2=+=6.3÷0.01=4--=÷=390×0.02=0.9-0.26=4×÷4×=

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解:,,6.3÷0.01=630,,
,390×0.02=7.8,0.9-0.26=0.64,.
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