作业帮能简便的用简便方法计算. 6.28*3.7+62.8*0.63 = 5/7+1/3*9+4/13 =
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能简便的用简便方法计算. 6.28*3.7+62.8*0.63 = 5/7+1/3*9+4/13 =
能简便的用简便方法计算. 6.28*3.7+62.8*0.63 = 5/7+1/3*9+4/13 =
能简便的用简便方法计算. 6.28*3.7+62.8*0.63 = 5/7+1/3*9+4/13 =
原式=6.28*3.7+6.28*10*0.63=6.28（3.7*10*0.63）=6.28*10=62.8
原式=5/7+3+4/13= 3+45/91+28/91=3又73/91