15．直接写得数．
| 35+37= | 9000-3000= | 15+60= | 60÷3= |
| 320×3= | 600+4000= | 72-8= | 23+60= |
| 600×2= | 75÷5= | 64÷2= | 26+38= |
| $\frac{2}{5}+\frac{2}{5}$= | $\frac{7}{10}-\frac{4}{10}$= | $\frac{1}{9}+\frac{7}{9}$= | $\frac{5}{8}-\frac{5}{8}$= |
一个面积是200m2的花坛里种了三种花，各种花的种植面积如图．
10．直接写出得数．
0 164523 164531 164537 164541 164547 164549 164553 164559 164561 164567 164573 164577 164579 164583 164589 164591 164597 164601 164603 164607 164609 164613 164615 164617 164618 164619 164621 164622 164623 164625 164627 164631 164633 164637 164639 164643 164649 164651 164657 164661 164663 164667 164673 164679 164681 164687 164691 164693 164699 164703 164709 164717 199269
| 3÷$\frac{1}{3}$= | $\frac{5}{8}$×$\frac{2}{5}$= | 1-$\frac{4}{9}$= | $\frac{1}{5}$÷5= |
| $\frac{6}{7}$÷$\frac{6}{7}$= | 0×$\frac{11}{4}$= | $\frac{9}{10}$÷$\frac{1}{5}$= | 100÷10%= |
| $\frac{1}{2}$×$\frac{4}{3}$= | $\frac{8}{9}$÷$\frac{2}{3}$= | $\frac{3}{16}$×$\frac{4}{15}$= | $\frac{4}{3}$×75%= |