①m一定是偶数、②(m,n)=4③n是m的25%④m:4=n:1⑤ (n÷10) × (4÷10) =m
215-108= |
42.3÷77= |
|
▲9.9×9÷1= |
12- |
25×20= |
12- |
1.1×0.01= |
1÷ |
a÷ |
①1675-475÷19×25
②27.3-2.7-77.3+73.7
③2.67×2.5+5.33×2.5+5
④12.5×44
⑤
⑥
前齿轮齿数 | 48 |
40 | |
后齿轮齿数 | 28 |
20 | |
16 | |
14 |