Question

14．甲乙丙一個(gè)修路隊(duì)合修條公路，甲隊(duì)比乙隊(duì)多修了$\frac{9}{16}$千，丙隊(duì)比乙隊(duì)少修了$\frac{5}{12}$千米，甲隊(duì)比丙隊(duì)多修了多少千米？

Answer 1

分析 甲隊(duì)比乙隊(duì)多修$\frac{9}{16}$千米，丙隊(duì)比乙隊(duì)少修$\frac{5}{12}$千米，它們的比較量都是乙隊(duì)修的長(zhǎng)度，甲隊(duì)比乙隊(duì)多的長(zhǎng)度加上丙隊(duì)比乙隊(duì)少的長(zhǎng)度，就是甲隊(duì)與丙隊(duì)多修了多少千米．

解答 解：$\frac{9}{16}$+$\frac{5}{12}$=$\frac{47}{48}$（千米）
答：甲隊(duì)比丙隊(duì)多修了$\frac{47}{48}$千米．

點(diǎn)評(píng) 本題只要理解甲、丙都是和乙進(jìn)行的比較，且一個(gè)比乙多，一個(gè)比乙少，所以求甲丙的差，只要把它們與乙的差相加即可．