13.做一做,结果能约分的要约分,是假分数的要化成带分数.
$\frac{1}{4}+\frac{1}{4}$= | $\frac{1}{8}+\frac{5}{8}$= | $\frac{5}{6}-\frac{1}{6}$= |
$\frac{3}{7}+\frac{5}{7}$= | $\frac{7}{10}+\frac{8}{10}$= | $\frac{9}{10}-\frac{3}{10}$= |
$\frac{7}{15}+\frac{11}{15}$= | $\frac{9}{20}+\frac{3}{20}$= | $\frac{11}{18}-\frac{5}{18}$= |
8.4是36和48的( )
A. | 因数 | B. | 公因数 | C. | 最大公因数 |
7.在A÷B=$\frac{A}{B}$中不能为0的数是( )
A. | A÷B | B. | $\frac{A}{B}$ | C. | B | D. | A |
6.如图中两个平行四边形的面积的关系是( )
0 158630 158638 158644 158648 158654 158656 158660 158666 158668 158674 158680 158684 158686 158690 158696 158698 158704 158708 158710 158714 158716 158720 158722 158724 158725 158726 158728 158729 158730 158732 158734 158738 158740 158744 158746 158750 158756 158758 158764 158768 158770 158774 158780 158786 158788 158794 158798 158800 158806 158810 158816 158824 199269
A. | S1>S2 | B. | S1<S2 | C. | S1=S2 | D. | 无法比较 |