《2025年心算口算巧算六年级上册北师大版》

1 求下面各比的比值。
$0.45:0.5=$
$4:0.2=$
$700:50=$
$\frac{2}{15}:\frac{1}{3}=$
$\frac{3}{5}:\frac{1}{2}=$
$\frac{15}{40}:\frac{3}{10}=$
$\frac{26}{36}:\frac{1}{18}=$
$\frac{9}{10}:\frac{1}{5}=$
$\frac{1}{4}:\frac{1}{8}=$
$20:6=$
$0.38:19=$
$\frac{5}{14}:\frac{6}{7}=$
$\frac{5}{22}:\frac{1}{11}=$
$63:7=$
$\frac{18}{24}:\frac{3}{8}=$

答案： $0.9$；$20$；$14$；$\frac{2}{5}$；$\frac{6}{5}$；$\frac{5}{4}$；$13$；$\frac{9}{2}$；$2$；$\frac{10}{3}$；$0.02$；$\frac{5}{12}$；$\frac{5}{2}$；$9$；$2$
$0.45:0.5=0.45÷0.5=0.9$
$4:0.2=4÷0.2=20$
$700:50=700÷50=14$
$\frac{2}{15}:\frac{1}{3}=\frac{2}{15}×3=\frac{2}{5}$
$\frac{3}{5}:\frac{1}{2}=\frac{3}{5}×2=\frac{6}{5}$
$\frac{15}{40}:\frac{3}{10}=\frac{3}{8}×\frac{10}{3}=\frac{5}{4}$
$\frac{26}{36}:\frac{1}{18}=\frac{26}{36}×18=13$
$\frac{9}{10}:\frac{1}{5}=\frac{9}{10}×5=\frac{9}{2}$
$\frac{1}{4}:\frac{1}{8}=\frac{1}{4}×8=2$
$20:6=20÷6=\frac{10}{3}$
$0.38:19=0.38÷19=0.02$
$\frac{5}{14}:\frac{6}{7}=\frac{5}{14}×\frac{7}{6}=\frac{5}{12}$
$\frac{5}{22}:\frac{1}{11}=\frac{5}{22}×11=\frac{5}{2}$
$63:7=63÷7=9$
$\frac{18}{24}:\frac{3}{8}=\frac{3}{4}×\frac{8}{3}=2$

2 化简下面各比。
$\frac{7}{8}:2\frac{1}{3}=$
$\frac{5}{6}:\frac{3}{5}=$
$0.4:1=$
$1:0.3=$
$\frac{5}{7}:\frac{10}{11}=$
$0.375:0.5=$
$\frac{5}{8}:\frac{1}{2}=$
$10:2=$
$\frac{4}{5}:0.2=$
$\frac{8}{11}:2\frac{1}{2}=$
$\frac{5}{12}:\frac{3}{4}=$
$1.2:36=$
$\frac{5}{6}:0.3=$
$30:6=$
$\frac{1}{2}:1\frac{1}{4}=$
$\frac{16}{5}:0.24=$
$1.44:2.4=$
$\frac{5}{6}:\frac{3}{10}=$
$\frac{3}{4}:\frac{9}{5}=$
$0.25:\frac{7}{8}=$
$65:13=$
$\frac{7}{8}:35\%=$
$0.07:4.2=$
$16:18=$

答案： $3:8$；$25:18$；$2:5$；$10:3$；$11:14$；$3:4$；$5:4$；$5:1$；$4:1$；$16:55$；$5:9$；$1:30$；$25:9$；$5:1$；$2:5$；$40:3$；$3:5$；$25:9$；$5:12$；$2:7$；$5:1$；$5:2$；$1:60$；$8:9$
$\frac{7}{8}:2\frac{1}{3}=\frac{7}{8}:\frac{7}{3}=(\frac{7}{8}×24):(\frac{7}{3}×24)=21:56=3:8$
$\frac{5}{6}:\frac{3}{5}=(\frac{5}{6}×30):(\frac{3}{5}×30)=25:18$
$0.4:1=4:10=2:5$
$1:0.3=10:3$
$\frac{5}{7}:\frac{10}{11}=(\frac{5}{7}×77):(\frac{10}{11}×77)=55:70=11:14$
$0.375:0.5=375:500=3:4$
$\frac{5}{8}:\frac{1}{2}=(\frac{5}{8}×8):(\frac{1}{2}×8)=5:4$
$10:2=5:1$
$\frac{4}{5}:0.2=\frac{4}{5}:\frac{1}{5}=4:1$
$\frac{8}{11}:2\frac{1}{2}=\frac{8}{11}:\frac{5}{2}=(\frac{8}{11}×22):(\frac{5}{2}×22)=16:55$
$\frac{5}{12}:\frac{3}{4}=(\frac{5}{12}×12):(\frac{3}{4}×12)=5:9$
$1.2:36=12:360=1:30$
$\frac{5}{6}:0.3=\frac{5}{6}:\frac{3}{10}=(\frac{5}{6}×30):(\frac{3}{10}×30)=25:9$
$30:6=5:1$
$\frac{1}{2}:1\frac{1}{4}=\frac{1}{2}:\frac{5}{4}=(\frac{1}{2}×4):(\frac{5}{4}×4)=2:5$
$\frac{16}{5}:0.24=\frac{16}{５}:\frac{6}{25}=(\frac{16}{5}×25):(\frac{6}{25}×25)=80:6=40:3$
$1.44:2.4=144:240=3:5$
$\frac{5}{6}:\frac{3}{10}=(\frac{5}{6}×30):(\frac{3}{10}×30)=25:9$
$\frac{3}{4}:\frac{9}{5}=(\frac{3}{4}×20):(\frac{9}{5}×20)=15:36=5:12$
$0.25:\frac{7}{8}=\frac{1}{4}:\frac{7}{8}=2:7$
$65:13=5:1$
$\frac{7}{8}:35\%=\frac{7}{8}:\frac{7}{20}=(\frac{7}{8}×40):(\frac{7}{20}×40)=35:14=5:2$
$0.07:4.2=7:420=1:60$
$16:18=8:9$