简便计算:4/7×3/4+4/7×1/4 10-2/7÷9/14-5/9 4/15×一又四分之三-4/15=? 35/36×(1/5+5/7)=?
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简便计算:
4/7×3/4+4/7×1/4
解,得:
==4/7*(3/4+1/4)
==4/7*1
==4/7
10-2/7÷9/14-5/9
解,得:
==10-4/9-5/9
==10-(4/9+5/9)
==10-1
==9
4/15×一又四分之三-4/15
解,得:
==4/15*7/4-4/15
==4/15*(7/4-1)
==4/15*3/4
==1/5
35/36×(1/5+5/7)
解,得:
==(35/36)*(1/5)+(35/36)*(5/7)
==7/36+25/36
==32/36
==8/9
4/7×3/4+4/7×1/4
解,得:
==4/7*(3/4+1/4)
==4/7*1
==4/7
10-2/7÷9/14-5/9
解,得:
==10-4/9-5/9
==10-(4/9+5/9)
==10-1
==9
4/15×一又四分之三-4/15
解,得:
==4/15*7/4-4/15
==4/15*(7/4-1)
==4/15*3/4
==1/5
35/36×(1/5+5/7)
解,得:
==(35/36)*(1/5)+(35/36)*(5/7)
==7/36+25/36
==32/36
==8/9
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