一、直接写出得数。
$\frac{3}{7}×2=$
$\frac{5}{6}×1=$
$\frac{3}{7}×\frac{1}{3}=$
$16×\frac{1}{4}=$
$\frac{5}{28}×7=$
$\frac{4}{5}×\frac{4}{7}=$
$\frac{7}{24}×\frac{3}{14}=$
$\frac{1}{6}+\frac{5}{6}×\frac{1}{5}=$
$\frac{2}{3}+\frac{4}{5}=$
$\frac{1}{3}×9×\frac{2}{3}=$
$\frac{5}{6}-\frac{3}{4}=$
$6×\frac{5}{8}=$
$\frac{1}{7}×\frac{7}{12}=$
$5-7×\frac{1}{7}=$
$3.6×\frac{11}{12}=$
$\frac{2}{9}×\frac{3}{4}=$
$\frac{7}{12}×2.4=$
$\frac{12}{23}×\frac{23}{24}=$
$13×\frac{5}{39}=$
$24×\frac{5}{6}=$
$\frac{3}{7}×2=$
$\frac{5}{6}×1=$
$\frac{3}{7}×\frac{1}{3}=$
$16×\frac{1}{4}=$
$\frac{5}{28}×7=$
$\frac{4}{5}×\frac{4}{7}=$
$\frac{7}{24}×\frac{3}{14}=$
$\frac{1}{6}+\frac{5}{6}×\frac{1}{5}=$
$\frac{2}{3}+\frac{4}{5}=$
$\frac{1}{3}×9×\frac{2}{3}=$
$\frac{5}{6}-\frac{3}{4}=$
$6×\frac{5}{8}=$
$\frac{1}{7}×\frac{7}{12}=$
$5-7×\frac{1}{7}=$
$3.6×\frac{11}{12}=$
$\frac{2}{9}×\frac{3}{4}=$
$\frac{7}{12}×2.4=$
$\frac{12}{23}×\frac{23}{24}=$
$13×\frac{5}{39}=$
$24×\frac{5}{6}=$
答案
1.$\frac{6}{7}$ 2.$\frac{5}{6}$ 3.$\frac{1}{7}$ 4.$4$ 5.$\frac{5}{4}$ 6.$\frac{16}{35}$ 7.$\frac{1}{16}$ 8.$\frac{1}{3}$ 9.$\frac{22}{15}$ 10.$2$ 11.$\frac{1}{12}$ 12.$\frac{15}{4}$ 13.$\frac{1}{12}$ 14.$4$ 15.$3.3$ 16.$\frac{1}{6}$ 17.$1.4$ 18.$\frac{1}{2}$ 19.$\frac{5}{3}$ 20.$20$
二、简便计算。
$\frac{9}{11}×\frac{7}{15}×\frac{11}{6}$
$\frac{6}{7}×\frac{6}{13}+\frac{7}{13}×\frac{6}{7}$
$\frac{13}{88}×87+\frac{13}{88}$
$\frac{9}{11}×\frac{7}{15}×\frac{11}{6}$
$\frac{6}{7}×\frac{6}{13}+\frac{7}{13}×\frac{6}{7}$
$\frac{13}{88}×87+\frac{13}{88}$
答案
1.$\frac{7}{10}$ 2.$\frac{6}{7}$ 3.$13$
三、括号里最大能填多少?(填整数)
$\frac{5}{8}×\frac{16}{5}>\frac{(\quad)}{9}$
$\frac{(\quad)}{6}×\frac{3}{5}<\frac{5}{6}$
$\frac{(\quad)}{4}×\frac{3}{5}<\frac{3}{4}$
$\frac{8}{9}×\frac{3}{10}<\frac{4}{(\quad)}$
$\frac{(\quad)}{6}×\frac{3}{4}<1$
$\frac{5}{12}×\frac{4}{5}<\frac{1}{(\quad)}$
$\frac{(\quad)}{6}×\frac{2}{5}<\frac{7}{10}$
$\frac{8}{15}×\frac{5}{6}<\frac{4}{(\quad)}$
$\frac{(\quad)}{7}×\frac{2}{3}<\frac{7}{8}$
$\frac{5}{8}×\frac{16}{5}>\frac{(\quad)}{9}$
$\frac{(\quad)}{6}×\frac{3}{5}<\frac{5}{6}$
$\frac{(\quad)}{4}×\frac{3}{5}<\frac{3}{4}$
$\frac{8}{9}×\frac{3}{10}<\frac{4}{(\quad)}$
$\frac{(\quad)}{6}×\frac{3}{4}<1$
$\frac{5}{12}×\frac{4}{5}<\frac{1}{(\quad)}$
$\frac{(\quad)}{6}×\frac{2}{5}<\frac{7}{10}$
$\frac{8}{15}×\frac{5}{6}<\frac{4}{(\quad)}$
$\frac{(\quad)}{7}×\frac{2}{3}<\frac{7}{8}$
答案
1.$17$ 2.$8$ 3.$4$ 4.$14$ 5.$7$ 6.$2$ 7.$10$ 8.$8$ 9.$9$
四、跨学科 人体构造 成年人体共有 206 块骨头,其中手骨的块数占全身骨头块数的$\frac{27}{103}$,指骨的块数又占手骨的$\frac{14}{27}$,人体的指骨共有(
扫码听算
1. 2. 3. 4.
5. 6. 7. 8.
28
)块。扫码听算
1. 2. 3. 4.
5. 6. 7. 8.
答案
28
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