负一又五分之二加6.3+4又七分之一减-2.6等于多少分数
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6又31/70
-1又2/5+6.3+4又1/7-2.6
=-7/5+63/10+29/7-26/10
=-7/5+(63/10-26/10)+
29/7
=-7/5+37/10+29/7
=-14/10+37/10+29/7
=23/10+29/7
=161/70+290/70
=451/70
=6又31/70。
-1又2/5+6.3+4又1/7-2.6
=-7/5+63/10+29/7-26/10
=-7/5+(63/10-26/10)+
29/7
=-7/5+37/10+29/7
=-14/10+37/10+29/7
=23/10+29/7
=161/70+290/70
=451/70
=6又31/70。
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-1又2/5+6.3+4又1/7-(-2.6)
=-1-2/5+6+3/10+4+1/7+2.6
=(-1+6+4)-4/10+3/10+1/7+2+6/10
=9+2-1/10+6/10+1/7
=11+5/10+1/7
=11+1/2+1/7
=11+7/14+2/14
=11+9/14
=11又9/14
=-1-2/5+6+3/10+4+1/7+2.6
=(-1+6+4)-4/10+3/10+1/7+2+6/10
=9+2-1/10+6/10+1/7
=11+5/10+1/7
=11+1/2+1/7
=11+7/14+2/14
=11+9/14
=11又9/14
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