1.下列各组线段能围成三角形的有( )
A. | 3cm,8cm,4cm | B. | 2cm,4cm,6cm | C. | 1cm,3cm,5cm | D. | 5cm,11cm,7cm |
20.125个0.1是( )
A. | 1.25 | B. | 12.5 | C. | 0.125 | D. | 125 |
19.0.4和0.40的计数单位( )
A. | 相同 | B. | 不同 | C. | 无法比较 |
17.直接写出得数.
0 157720 157728 157734 157738 157744 157746 157750 157756 157758 157764 157770 157774 157776 157780 157786 157788 157794 157798 157800 157804 157806 157810 157812 157814 157815 157816 157818 157819 157820 157822 157824 157828 157830 157834 157836 157840 157846 157848 157854 157858 157860 157864 157870 157876 157878 157884 157888 157890 157896 157900 157906 157914 199269
2.11+0.88= | 0.34+0.6= | 15.36-15= | 1-0.04= |
0.125×8= | 0.2×100= | 7.3÷100= | 4÷2.5= |