Add the pairs of numbers. One pair is different from others. Find out. 

     a)  8+3     b)  6+3      c) 7+4     d) 10+1 

Fill in the blank place. 

11 + 8 =

8 Mangoes and 5 mangoes are _______ mangoes.

Choose the correct one. 

(a) 10+5 =15

(b) 12+3= 13

(c) 11+2 = 16

 (d) 14+3= 18

4 tens + 3 tens = ______ tens

14+ 3  =

4 + 6 + 8 + 1 =

Which one is the next number of 19. 

18, 17, 20, 19

10 balloons and 7 balloons are