Using Doubles to Add
1+2= ?
1+1= 2 +1=3
Write a related addition fact for 2+3=5
3+2=5
1+2+1=
4
9+2= ?
9+1=10+1=11
4-1= ?
3
4+5= ?
4+4=8+1=9
Write a related addition fact for 6+3=9
3+6=9
3+5+4=
12
7+6= ?
7+3=10+3=13
6-2= ?
4
7+8= ?
7+7=14+1=15
Write a related subtraction fact for 5+6=11
11-6=5 or 11-5=6
6+4+5=
15
5+9=
5+5=10+4=14
11-5= ?
6
12+10= ?
10+10=20+2=22
Write all 3 other related facts for 7+9=16
9+7=16
16-9=7
16-7=9
10+5+4=
19
7+8= ?
7+3=10+5=15
16-9= ?
7