Question

10．甲乙兩隊(duì)合修一條公路，甲隊(duì)修了全長(zhǎng)的$\frac{3}{7}$，乙隊(duì)修了全長(zhǎng)的$\frac{4}{7}$，乙隊(duì)比甲隊(duì)多修這條公路的幾分之幾？

Answer 1

分析 甲隊(duì)修了全長(zhǎng)的$\frac{3}{7}$，乙隊(duì)修了全長(zhǎng)的$\frac{4}{7}$，根據(jù)分?jǐn)?shù)減法的意義，用乙隊(duì)修的占全長(zhǎng)的分率減去甲隊(duì)修的占的分率，即得乙隊(duì)比甲隊(duì)多修這條公路的幾分之幾．

解答 解：$\frac{4}{7}$-$\frac{3}{7}$=$\frac{1}{7}$
答：乙隊(duì)比甲隊(duì)多修這條公路的$\frac{1}{7}$．

點(diǎn)評(píng) 本題考查了學(xué)生完成簡(jiǎn)單的分?jǐn)?shù)減法應(yīng)用題的能力．