Show:
1 grade
2 grade
3 grade
4 grade
5 grade
100

2+2=?

4

100

24+24=?

48

100

2X4=

8

100

50x7

350

100

350x7

2450

200

4+4=?

8

200

12+12=

24

200

3X3

9
200

7x45

315

200

80x9

720

300

5+5=?

10

300

132+6=?

138

300

6X3

18
300

80x8

640

300

55x67

3685

400

10+10=?

20

400

1,05005+0=

105005

400

7x6

42

400

10x50

500

400

155x6

930
500

14+15=?

29

500

150+120

270

500

7x7

49

500

3x2000

6000

500

30x7

210