18.计算下面各题
$\frac{36}{49}$×$\frac{7}{12}$ | $\frac{2}{27}$×$\frac{9}{10}$ | $\frac{91}{25}$×$\frac{100}{13}$ |
$\frac{28}{33}$×$\frac{22}{35}$×$\frac{2}{5}$ | 48×$\frac{3}{4}$×$\frac{7}{6}$ | $\frac{4}{5}$×$\frac{5}{16}$×600 |
13.用竖式计算
0.03÷0.12= | 104.78÷26= | 342÷3.8= | 1.35÷0.54= |
3.12÷0.8= | 1.29÷6.45= | 2.06÷0.4= | 36÷2.5= |
12.下面各题的商,哪些是小于1的( )
A. | 18.9÷27 | B. | 3.6÷36 | C. | 0.05÷0.03 |
11.口算.
6.3÷0.9= | 0.7×12= | 0.04×0.4= | 0.72÷36= |
2.14÷2= | 8×0.5= | 0.2×0.5= | 1.8÷3= |
2.7×2= | 2.5×4=. | 25÷5= | 0.4÷8= |
3.8×0.1= | 15÷0.01= | 0.64×0.03= | 1.8×5= |
0.8×0.3= | 0.12×0.5= | 1.32×3= | 0÷1.25= |
10.脱式计算.(能简算的要简算)
$\frac{1}{9}$+$\frac{3}{7}$+$\frac{8}{9}$ | $\frac{5}{7}$-$\frac{5}{14}$+$\frac{3}{7}$ | 13-$\frac{2}{7}$-$\frac{5}{7}$ |
$\frac{3}{4}$+$\frac{5}{6}$-$\frac{2}{3}$ | $\frac{2}{5}$+($\frac{5}{6}$-$\frac{2}{5}$) | $\frac{3}{4}$+($\frac{1}{2}$-$\frac{7}{8}$) |
9.直接写出得数.
0 162481 162489 162495 162499 162505 162507 162511 162517 162519 162525 162531 162535 162537 162541 162547 162549 162555 162559 162561 162565 162567 162571 162573 162575 162576 162577 162579 162580 162581 162583 162585 162589 162591 162595 162597 162601 162607 162609 162615 162619 162621 162625 162631 162637 162639 162645 162649 162651 162657 162661 162667 162675 199269
8a+7a= | $\frac{3}{7}$+$\frac{5}{7}$= | $\frac{3}{4}$+$\frac{1}{6}$= | 7-$\frac{1}{3}$= |
$\frac{11}{7}$-$\frac{4}{7}$= | 7c-c= | $\frac{11}{15}$-$\frac{2}{5}$= | 0.5+1$\frac{1}{2}$= |