0.22= |
6.8+1.28= |
0.5÷0.25= |
50×30%= |
1﹣1÷7= |
6÷= |
×24= |
2008﹣199= |
+= |
2.5×0.7×0.4= |
①1.8+3.84÷(15﹣12.6) |
② |
③ |
④0.4×80×2.5×0.125 |