13.直接写得数.
| 360÷40= | 15×6= | 68÷17= | 90-0÷30= |
| 160-70= | 69÷3= | 42÷3= | 3×25= |
12.纸上有4个点,经过两点画一条直线,最多能画( )条直线.
| A. | 3 | B. | 4 | C. | 6 | D. | 8 |
11.与480×40的积相等的算式是( )
| A. | 8×40 | B. | 24×800 | C. | 480×400 |
4.解方程.
0 135955 135963 135969 135973 135979 135981 135985 135991 135993 135999 136005 136009 136011 136015 136021 136023 136029 136033 136035 136039 136041 136045 136047 136049 136050 136051 136053 136054 136055 136057 136059 136063 136065 136069 136071 136075 136081 136083 136089 136093 136095 136099 136105 136111 136113 136119 136123 136125 136131 136135 136141 136149 199269
| x÷8=8.8 | x+0.7=5 | 4x=16×8 |
| x-1.5=7.5 | 3.7+x=4.6(检验) | 24x=9.6(检验) |