综合算式:
( )>( )>( )>( )>( )>( )
3.11, 3.16, 3.21, 3.26, 3.31,
5.898,5.893, 5.888, 5.883, 5.878,
每车运的吨数/吨
1
3
5
10
12
需要车的辆数/辆
60
20
6
n
0
2
4
……
2n
①12.5×(8+0.8)
②+×
③+÷
④26﹣7.28﹣12.72
⑤5.8×4.1+5.9×5.8
⑥÷(+1.4×)