572-298=274; 0.75+99×0.75=75; 9.5+0.59=10.09; 250×0.04=10;
6-
2
9 -
7
9 =5; 1÷
4
9 ×
2
3 =1.5; 76×99=7524; 0.125×9×8=9;
(16+
8
9 )÷8 =2
1
9 ; 0.56÷0.8×5=3.5;
1
8 ×8÷
1
8 ×8 =64; 15.73-(2.8+1.73)=11.2. 故答案依次为:274,75,10.09,10,5,1.5,7524,9, 2
1
9 ,3.5,64,11.2.