Question

50+40

30+20

50+20

30+30

20+40

Answer 1

50+40=5+4=9

Vay:50+40=90

30+20=3+2=5

Vay:30+20=50

50+20=5+2=7

Vay:50+20=70

30+30=3+3=3*2=6

Vay:30+30=60

20+40=2+4=6

Vay:20+40=60

Answer 2

1.   90

2 .  60

3 .  70

4 .  60 

5 .  60

Answer 3

mk xin lỗi nhé ở câu thứ 2 bằng 50 nhé

Answer 4

50 + 40 = 90

30 + 20 = 50

50 + 20 = 70

30 + 30 = 60

20 + 40 = 60

Answer 5

50+40=90

30+20=50

50+20=70

30+30=60

20+40=60

Chuc cac bn hoc tot

Answer 6

50+40=90 30+20=50 50+20=70 30+30=60 20+40=60

Answer 7

50+40=90

30+20=50

50+20=70

30+30=60

20+40=60

Answer 8

50+40=90

30+20=50

50+20=70

30+30=60

20+40=60

Answer 9

50+40=90

30+20=50

50+20=70

30+30=60

20+40=60

Answer 10

50+40=90

30+20=50

50+20=70

30+30=60

20+40=60

Answer 11

50+40=90

30+20=50

50+20=70

30+30=60

20+40=60