33+12= 45
23+13=36
23-16=7
8+6+4
=8+10
=18
15+18=33
17-15=2
2+8+9
=10+9
=19
18-13=5
9+2+1
=10+2
=12
15+5+6
=20+6
=26
14+16+12
=30+12
=42
18-15=3
17-8=9
16-11=5
7+3+8
=10+8
=18
18+2+13
=20+13
=33
15+5+9
=
=29
=
=
9+1+9
=10+9
=19
7+3+9
=10+9
=19
18+2+15
=20+15
=35
20+1=21
20+2=22
20+3=23
20+4=24
20+5=25
20+6=26
20+8=28
20+9=29
20+10=30
20+11=31
20+12=32
20+15=35
20+16=36
20+17=37
20+18=38
20+19=39
20+20=40
18+2+15
=20+15
=35
13+8+7
=20+8
=28
14+8+6
=20+8
=28
12+14+6
=20+12
=32
15+7+5
=20
=27
19+20+1
=20+20
=40
今天晚上学了一晚上的算术题。
