Show:
Kindergarten
1st grade
2nd grade
3rd grade
4th grade
100

1+1=

2

100

4+5+3=

12

100

6+4+8+9+3+2-3-4=

25

100

9x5=

45

100

10x50+200=

700

200

1-1=

0

200

3+3+3

9

200

4+5-3-2+5+7-5=

11

200

3x3+7-8=

8

200

300x5-500-400+200=

800

300

2+2


4

300

3-3+2+1=

3


300

2+3+4+5-2-3-4=

5

300

4x4-5+7=

18

300

20x10+200+200-400-100+500=

600

400

2-1=

1

400
4+6+8=

18

400

5+3+4-4-7+9=

10

400

4x4x2+3+2=

37

400

5x5x4+200+300+400+300-500=

800

500

3+2=

5

500

6+9+8+7=

30

500

5+3+5+7-2-8-9+3+7+9=

20

500

4x6+5-5+4+6-4+2=

32

500

4x6x1+400-200+40-50-200x2+2=

10