7/15 ×3/8 + 1/15 × 7/16 + 1/15 × 3又1/2=?(简便运算,)
问题描述:
7/15 ×3/8 + 1/15 × 7/16 + 1/15 × 3又1/2=?(简便运算,)
希望各位能给我一个准确的答案,我感激不尽!但是不许乱输答案,
答
7/15 ×3/8 + 1/15 × 7/16 + 1/15 × 3又1/2
=7/15 ×3/8 + 7/15×1/16+7/15×1/2
=7/15×(3/8+1/16+1/2)
=7/15×15/16
=7/16