2.3+3.6=5.9, 5.6÷2.8=2, 0.25×40=10, 38+19=57, 1-
2
3 =
1
3 ,
2
3 +
2
3 =
4
3 ,
2
3 +
2
3 =
4
3 ,
2
3 +
2
3 =
4
3 , 98-57=41, 62-38=24,
2.64+1.36=4, 0÷5=0, 4-0.25=3.75, 0.125×80=10, 9-4.35=4.65,
0.55÷1.1=0.5, 1÷0.1=10, 0.45×100=45, 0.04÷4=0.01, 0.68+0.32=1.