2
$0.34 + 0.47 =$ $2 + 0.43 =$ $0.23 + 0.07 =$
$9.1 - 5.2 =$ $4.7 - 2.6 =$ $2.9 + 6.7 =$
$2.2 + 3.8 =$ $1.55 - 0.55 =$ $8.5 - 0.6 =$
$0.19 + 0.33 =$ $6.2 + 1.6 =$ $7.81 + 3.2 =$
$0.3 + 1.12 =$ $1.5 - 0.6 =$ $7.1 + 2.34 =$
$5.57 + 3.4 =$ $8.36 + 1.2 =$ $4.2 - 1.2 =$
$0.95 - 0.45 =$ $2.5 + 6.6 =$ $3.2 - 0.3 =$
$2.2 - 1.4 =$ $3.31 - 2.2 =$ $4.5 - 2.3 =$
$5 - 3.2 =$ $9.3 - 4.5 =$ $9.47 - 3.9 =$

0.34 + 0.47 = 0.81
2 + 0.43 = 2.43
0.23 + 0.07 = 0.3
9.1 - 5.2 = 3.9
4.7 - 2.6 = 2.1
2.9 + 6.7 = 9.6
2.2 + 3.8 = 6
1.55 - 0.55 = 1
8.5 - 0.6 = 7.9
0.19 + 0.33 = 0.52
6.2 + 1.6 = 7.8
7.81 + 3.2 = 11.01
0.3 + 1.12 = 1.42
1.5 - 0.6 = 0.9
7.1 + 2.34 = 9.44
5.57 + 3.4 = 8.97
8.36 + 1.2 = 9.56
4.2 - 1.2 = 3
0.95 - 0.45 = 0.5
2.5 + 6.6 = 9.1
3.2 - 0.3 = 2.9
2.2 - 1.4 = 0.8
3.31 - 2.2 = 1.11
4.5 - 2.3 = 2.2
5 - 3.2 = 1.8
9.3 - 4.5 = 4.8
9.47 - 3.9 = 5.57

连一连

时间()

4.77+3.25=8.02
4.1-3.7=0.4
3.2+4.33=7.53
5.3-1.7=3.6
9.85-1.83=8.02
4.3-3.9=0.4
7.43-3.83=3.6
2.7+4.83=7.53
连线结果：
4.77+3.25——8.02
4.1-3.7——0.4
3.2+4.33——7.53
5.3-1.7——3.6
9.85-1.83——8.02
4.3-3.9——0.4
7.43-3.83——3.6
2.7+4.83——7.53