3.8 + 2.2 =
3.4 - 1.04 =
1.6 + 2.04 =
7.28 + 1.02 =
9.04 + 3.8 =
7.9 - 2.6 =
2.57 - 2.36 =
2.56 + 1.03 =
4.08 + 3.2 =

直接写出得数。
2.5 + 8.5 =
9.27 - 1.3 =
6.02 + 4.69 - 2.02 =
3.6 + 2.4 =
4.2 + 3.6 =
9.4 - 7.5 + 2.5 =
8.5 - 2.45 =
1.36 + 5.4 =
6.78 + 3.57 + 9.22 =
9.5 - 2.16 =
7.9 - 2.6 =
7.8 + 2.9 - 3.6 =
1.8 + 3.72 =
2.1 - 1.09 =
8.49 + 8.51 + 4.79 =
7.6 - 3.8 =
4.2 - 1.9 + 2.1 =
9.94 - 6.66 - 2.34 =
2.89 - 1.07 =
9.7 - 7.9 =
7.1 - 1.2 + 4.1 =
7.1 - 1.05 =
8.7 + 1.03 =
9.63 + 7.37 - 8.79 =
5.09 + 2.4 =
2.9 - 1.72 =
4.76 - 1.27 - 2.73 =

填空。
( ) + 2.35 = 10 10 - ( ) = 5.06
3.6 + ( ) = 4.3
( ) - 1.28 = 7.9 ( ) + 2.05 = 8.2
( ) - 7.06 = 12