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一、填表。
答案
一、156 643 424
549 241 729
549 241 729
二、在$◯$里填“＞”“＜”或“=”。
$\dfrac{3}{4}◯\dfrac{1}{4}$ $\dfrac{3}{4}-\dfrac{2}{4}◯\dfrac{2}{4}$ $\dfrac{1}{7}+\dfrac{3}{7}◯\dfrac{5}{7}-\dfrac{1}{7}$
$\dfrac{1}{7}◯\dfrac{1}{2}$ $\dfrac{1}{9}+\dfrac{2}{9}◯\dfrac{4}{9}$ $\dfrac{3}{10}-\dfrac{2}{10}◯\dfrac{4}{10}-\dfrac{2}{10}$
$\dfrac{2}{3}◯\dfrac{1}{3}$ $\dfrac{2}{10}-\dfrac{2}{10}◯\dfrac{2}{10}$ $\dfrac{3}{7}+\dfrac{3}{7}◯\dfrac{6}{7}-\dfrac{1}{7}$
$\dfrac{6}{9}◯\dfrac{8}{9}$ $\dfrac{5}{6}-\dfrac{4}{6}◯\dfrac{9}{10}-\dfrac{8}{10}$ $\dfrac{2}{6}+\dfrac{3}{6}◯\dfrac{6}{6}-\dfrac{1}{6}$
$\dfrac{3}{4}◯\dfrac{1}{4}$ $\dfrac{3}{4}-\dfrac{2}{4}◯\dfrac{2}{4}$ $\dfrac{1}{7}+\dfrac{3}{7}◯\dfrac{5}{7}-\dfrac{1}{7}$
$\dfrac{1}{7}◯\dfrac{1}{2}$ $\dfrac{1}{9}+\dfrac{2}{9}◯\dfrac{4}{9}$ $\dfrac{3}{10}-\dfrac{2}{10}◯\dfrac{4}{10}-\dfrac{2}{10}$
$\dfrac{2}{3}◯\dfrac{1}{3}$ $\dfrac{2}{10}-\dfrac{2}{10}◯\dfrac{2}{10}$ $\dfrac{3}{7}+\dfrac{3}{7}◯\dfrac{6}{7}-\dfrac{1}{7}$
$\dfrac{6}{9}◯\dfrac{8}{9}$ $\dfrac{5}{6}-\dfrac{4}{6}◯\dfrac{9}{10}-\dfrac{8}{10}$ $\dfrac{2}{6}+\dfrac{3}{6}◯\dfrac{6}{6}-\dfrac{1}{6}$
答案
二、＞ ＜ =
＜ ＜ ＜
＞ ＜ ＞
＜ ＞ =
＜ ＜ ＜
＞ ＜ ＞
＜ ＞ =
三、用竖式计算，带*的要验算。
$62×11$ $26×38$ *$68×15$
$99×20$ $83×35$ *$48×54$
$54×75$ $90×96$ *$47×23$
$62×11$ $26×38$ *$68×15$
$99×20$ $83×35$ *$48×54$
$54×75$ $90×96$ *$47×23$
答案
三、682 988 1020
1980 2905 2592
4050 8640 1081
1980 2905 2592
4050 8640 1081
