1-0.009=0.991, 0.25×101=25.25, 3÷0.03=100, 6π≈18,
1
4 ×
2
3 =
1
6 ,
4
15 ÷
8
35 = 1
1
6 ,
2
3 +
1
5 =
13
15 , 31×199≈6000. 故答案为:0.991,25.25,100,18,
1
6 , 1
1
6 ,
13
15 ,6000.
1-0.009=0.991, 0.25×101=25.25, 3÷0.03=100, 6π≈18,
1
4 ×
2
3 =
1
6 ,
4
15 ÷
8
35 = 1
1
6 ,
2
3 +
1
5 =
13
15 , 31×199≈6000. 故答案为:0.991,25.25,100,18,
1
6 , 1
1
6 ,
13
15 ,6000.