for grade 1- grade 4

1. 1+2= 9+4= 24+5= 25+2= 40+4=
56+3= 57+2= 58+1= 59+2= 60+1=
2+4= 10+50= 23+4= 26+4= 39+2=
81+2= 82+2= 83+6= 84+1= 85+2=
3+3= 11+4= 22+1= 27+3= 38+1=
61+4= 62+5= 63+4= 64+1= 65+1=
4+5= 12+6= 21+2= 28+2= 37+1=
51+9= 52+2= 53+5= 54+3= 55+2=
5+8= 13+8= 20+3= 29+1= 36+3=
6+6= 14+5= 19+2= 30+2= 35+4=
66+5= 67+2= 68+4= 69+2= 70+8=
7+9= 15+5= 18+2= 31+3= 34+5=
40+5= 1+20= 12+5= 41+3= 11+8=
8+2= 16+8= 17+5= 32+1= 33+1=
71+6= 72+3= 73+2= 74+2= 75+1=
90+9= 89+2= 88+3= 87+3= 86+2=
41+4= 42+5= 43+3= 44+1= 45+5=
76+3= 77+4= 78+1= 79+2= 80+4=
95+2= 94+3= 93+2= 92+1= 91+2=
46+4= 47+4= 48+1= 49+3= 50+3=
96+5= 97+2= 98+1= 99+1= 10+4=
13+9= 20+6= 12+6= 21+2= 14+3=
24+5= 15+5= 27+2= 16+3= 26+5=
17+4= 25+4= 23+4= 40+4= 22+4=
15+4= 13+4= 55+4= 88+4= 44+4=