(-7)+11+3+(-2) 1/4+(-2/3)+5/6+(-1/4)+(-1/3)等于几
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(-7)+11+3+(-2) 1/4+(-2/3)+5/6+(-1/4)+(-1/3)等于几
(-7)+11+3+(-2) 1/4+(-2/3)+5/6+(-1/4)+(-1/3)等于几
(-7)+11+3+(-2) 1/4+(-2/3)+5/6+(-1/4)+(-1/3)等于几
这分明是两个式子
(-7)+11+3+(-2)
= -7+11+3-2
=4+3-2
=7-2
=5
1/4+(-2/3)+5/6+(-1/4)+(-1/3)
=1/4-2/3+5/6-1/4-1/3
=(1/4-1/4)-(2/3+1/3)+(5/6)
=0-1+5/6
= -1+5/6
= -1/6
2-1/11-3/11-7/11 3/4-(1/5-1/4) 简便算啊.
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2001×(1/7+十2/11+3/13+4/5)
(-7)+11+3+(-2) 1/4+(-2/3)+5/6+(-1/4)+(-1/3)等于几
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2/5*7+4/7*11+6/16*22+3/2*5+5/11*16+7/22*29+1/29