1st grade
2 grade
3rd grade
4th grade
100

12+36

48

100

100000+30

1000030

100

10x3

30

100

(4+2)+(3+5)

14

200

19+7

26

200

2x2

4

200

20x2

40

200

(6+3)+(4+5)

17

300

190-90

100

300

3-2

1

300

30+400

430

300

30x9

270

400

20+20+90

130

400

400-395

5

400

380x1

380

400

(5x5)-(6+5)

14

500

1200-1198

2

500

500+200

700
500
9x2

18

500

(200-100)+(40+60)

200