12.口算
7×$\frac{3}{14}$= | $\frac{6}{7}$÷6= | $\frac{5}{14}$÷$\frac{5}{14}$= |
$\frac{3}{7}$×$\frac{1}{3}$= | 4×90%= | $\frac{1}{2}$÷60%= |
$\frac{1}{8}$÷$\frac{5}{2}$= | $\frac{1}{3}$×0.15= | $\frac{3}{7}$÷$\frac{7}{8}$= |
11.一桶油,吃去$\frac{4}{5}$,还剩$\frac{5}{6}$千克,这桶油原来重多少千克?正确的列式为( )
A. | $\frac{5}{6}$÷$\frac{4}{5}$ | B. | $\frac{5}{6}$×(1-$\frac{4}{5}$) | C. | $\frac{5}{6}$÷(1-$\frac{4}{5}$) |
10.一个饲养组一共养鸡、兔78只,共有200只脚,饲养组养鸡( )只.
A. | 56 | B. | 22 | C. | 65 |
9.丽娜坐在教室的第五列第三行,用数对(5,3)表示,小米坐在第四列第一行,可以用数对( )
0 156556 156564 156570 156574 156580 156582 156586 156592 156594 156600 156606 156610 156612 156616 156622 156624 156630 156634 156636 156640 156642 156646 156648 156650 156651 156652 156654 156655 156656 156658 156660 156664 156666 156670 156672 156676 156682 156684 156690 156694 156696 156700 156706 156712 156714 156720 156724 156726 156732 156736 156742 156750 199269
A. | (4,1) | B. | (1,4) | C. | (9,4) |