用简便方法算
3.2×19+3.2=
[ ]
|
A.5.4 |
B.6.4 |
|
C.46 |
D.64 |
用简便方法算
0.25×3.06×0.4=
[ ]
|
A.3.06 |
B.30.6 |
|
C.0.306 |
D.306 |
用简便方法算
4.7×1.25×0.8=
[ ]
|
A.7.4 |
B.4.7 |
|
C.3.7 |
D.47 |