1/2 × 1/5 + 1/5 × 1/8 + 1/8 × 1/11 + 1/11 × 1/14 + 1/14 × 1/
1个回答
=1/3×(1/2-1/5+1/5-1/8+1/8-1/11+1/11-1/14+1/14-1/17)
=1/3×(1/2-1/17)
=1/3×(15/34)
=5/34
相关问题
1/5×8+1/8×11+1/11×14+……+1/92×95等于多少,
1/5×8+1/8×11+1/11×14+……1/92×95= 简便计算
计算1/5×8+1/8×11+1/11×14+1/14×17+1/17×20,它的结果是多少,
(1/2-1/6)×5+1/4×4/5 11/28×8/33+13/14×25/26 4
1/2×5+1/3×5+1/8×11······﹢1/20×23
1/2×4+1/3×5+1/4×6+1/5×7+……+1/8×10+1/9×11
用简便方法计算.5×1.25×2×8×11 1.5÷1.25 67-(1
1/1×2×3+1/2×3×4+1/3×4×5······+1/8×9×10+1/9×10×11等于多少
1/11×12+1/12×13+1/13×14+……+1/98×99+1/99×100=?
1/(1×3×5)+1/(3×5×7)+1/(5×7×9)+1/(7×9×11)+1/(9×11×13)的简便算法