五年級小學數(shù)學口算題300題(專業(yè)版)
【正文】 ＝ 4= 247。12= = 1740= 10063= += == = 247。20= 200= 3/4 + 1/4 == 247。35= 2512= 135247。15== 4247。12= == 1740= 10063= += = 247。17= = +19= 247。= 3/4 + 1/4 = 2 + 4/9 = 3 2/3 = 2 1/6 1/3 =3/4 1/2= 1/6 + 1/2 1/6 = (+)= 7/8 + 3/8 = 3/10 +1/5 = 4/5 7/10 = 8= = 0= 1= 4247。5+1247。= 247。35= 1247。= 3/4 + 1/4 = 2 + 4/9 = 3 2/3 = 3/4 1/2= =1/6 + 1/2 1/6 = (+)= 7/8 + 3/8 = 3/10 +1/5 = 4/5 7/10 = 1740= 2 1/6 1/3 =
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