83-57=26 1-0.74=0.26 0.24×50=12 178.5-36.5-63.5=78.5
1÷
2
9 =4.5
1
3 -
1
4 =
1
12 6
3
4 -0.25=6.5 1.25×3×8=30
6.4×
1
4 =1.6
2
7 +
3
4 =
29
28 2.6÷0.4=6.5 18×(
1
2 -
1
6 )=6
5
8 ÷
1
10 =
25
4 4.5×0=0 81÷
9
4 =36 8×
1
8 ÷8×
1
8 =
1
64 故答案为:26,0.26,12,78.5,4.5,
1
12 ,6.5,30,1.6,
29
28 ,6.5,6,
25
4 ,0,36,
1
64 .