(2+1/3+1/4+1/5)×(1/3+1/4+1/5+1/6)—(2+1/3+1/4+1/5+1/6)×(1/3+1
1个回答
aX1/6-1/6b=1/6x(a-b)=1/6x[(1/2+1/3+1/4+1/5)-(1/3+1/4+1/5)]=1/6x1/2=1/12
以上回答你满意么?
相关问题
已知1/2×3=1/2-1/3,计算:1+1/2×3+1/3×4+1/4×5+1/5×6
1×3+1=4=2²,2×4+1=9=3²,3×5+1=16=4²,4×6+1=25=5&
(2011•于都县模拟)[1/1×2]+[1/2×3]+[1/3×4]+[1/4×5]+[1/5×6]+[1/6×7]+
2×3/1+3×4/1+4×5/1+5×6/1+.199×200/1=?
0×1×2×3+1=1=1^2 1×2×3×4+1=25=5^2 2×3×4×5+1=121=11^2 3×4×5×6+
1×2/1+1×2×3/2+1×2×3×4/3+1×2×3×4×5/4+1×2×3×4×5×6/5等于多少啊
1/1×2+1/2×3+1/3×4+1/4×5+1/5×6……+1/2002×2003+1/2003×2004
(1)6×0.3= (2) 0.5÷ 1 7 = (3) 1 4 - 1 5 = (4)15×0.4= (5) 1.6×
观察: 1×3+1=4= 2 2 2×4+1=9= 3 2 3×5+1=16= 4 2 4×6+1=25= 5 2 …
观察下列各式 1/6=1/2×3=1/2-1/3 1/12=1/3×4=1/3-1/4 1/20=1/4×5=1/4-1