12.怎样简便怎样计算.
| 125×808 | 102×58 | 5300÷25÷4 |
| 125×32×5 | 107×15+107×4+107 | (87-25)×12÷6. |
11.口算写出得数.
| 30×173= | 125×8= | 125÷5= | 0.039×100= | 8÷1000= |
| 7×14= | 4×19-2= | 100÷4= | 4×203= | (24-8)÷8= |
10.小芳用简便方法计算47×102,算成了47×100.计算结果与正确答案相比( )
0 130893 130901 130907 130911 130917 130919 130923 130929 130931 130937 130943 130947 130949 130953 130959 130961 130967 130971 130973 130977 130979 130983 130985 130987 130988 130989 130991 130992 130993 130995 130997 131001 131003 131007 131009 131013 131019 131021 131027 131031 131033 131037 131043 131049 131051 131057 131061 131063 131069 131073 131079 131087 199269
| A. | 多2 | B. | 少2 | C. | 少94 |