6.计算40.2÷3的竖式如图,竖式中的“12”表示( )
A. | 12个1 | B. | 12个0.1 | C. | 12个0.01 | D. | 12个10 |
5.下列四个算式中,结果最大的是( )
A. | 3.5×0.98 | B. | 3.5÷1.05 | C. | 3.5-0.98 | D. | 3.5×2÷3.5×2 |
18.解方程.
0 158598 158606 158612 158616 158622 158624 158628 158634 158636 158642 158648 158652 158654 158658 158664 158666 158672 158676 158678 158682 158684 158688 158690 158692 158693 158694 158696 158697 158698 158700 158702 158706 158708 158712 158714 158718 158724 158726 158732 158736 158738 158742 158748 158754 158756 158762 158766 158768 158774 158778 158784 158792 199269
25+8x=65 | x÷8=$\frac{3}{32}$ | x÷$\frac{5}{8}$=$\frac{1}{12}$ |
6x-9=4 | 5x-x=72 | $\frac{1}{2}$x=16 |