11.能简算的要求简算
520×(80-720÷9) | 125×25×8×4 | 242-105+158-95 |
85+13×7+25 | (75+420)÷(50-17) | 156×101-156 |
9.地球赤道的周长是四万零七十五点二四千米,写作( )千米.
A. | 4000075.24 | B. | 40075.24 | C. | 40705.24 |
8.下面各数中去掉“O”后,数的大小不变的是( )
A. | 87.08 | B. | 8.708 | C. | 87.80 |
7.9.96保留一位小数是( )
0 157820 157828 157834 157838 157844 157846 157850 157856 157858 157864 157870 157874 157876 157880 157886 157888 157894 157898 157900 157904 157906 157910 157912 157914 157915 157916 157918 157919 157920 157922 157924 157928 157930 157934 157936 157940 157946 157948 157954 157958 157960 157964 157970 157976 157978 157984 157988 157990 157996 158000 158006 158014 199269
A. | 9.9 | B. | 10 | C. | 10.0 |