8×0.4表示______，得______．
8×0.4表示8个0.4相加，
8×0.4=3.2，
故答案为：8个0.4相加，3.2．
—What are you doing now? —I’m my dog. Can you help me it?
A. finding, find B. looking for, find C. finding, look for
汽车在平直的高速公路上行驶，1min通过了1800m的路程，汽车的速度是 [ ]
A.1800m/s
B.108m/s
C.90 m/s
D.30m/s
