Doubles
2+2=
4
8+7=
15
Martha had 8 apples and 3 oranges. How many pieces of fruit does she have in all?
11 pieces of fruit
9+7=
Rewrite this equation to make a 10
10+6=16
25+5=
30
4+4
8
If I have 6+5 and I want to double 5 to help me find the answer, will I add one more or take one away?
Add one more because 6 is bigger
I had 18 dollars. I bought a toy that cost 8 dollars. How many dollars do I have left?
10 dollars
11+8
Rewrite this equation to make a 10
10+9=19
43-9=
34
8+8
16
If I have 8+9 and I want to double 9. Would I add one more or take one away?
Take one away because the other number 8, is one less than 9.
Zack ran 5 miles down the road. Then, he ran 4 more miles. After he was done, he had to run 2 more miles home. How many miles did Zack run?
11 miles
8+7
Rewrite this equation to make a 10
10+5=15
70-8=
62
9+9
18
10+11=
21
I was building with blocks. I had 29 blocks stacked up. Sally came and knocked down 10 of my blocks. How many do I have left?
19 blocks
12+5=
Rewrite this equation to make a 10
10+7=17
92-6=
86
12+12=
24
If I wanted to complete the equation 14+15 and I wanted to double 14, Would I add one more or take one away after the double?
You would add 1 more because 14 is the smaller number and 15 is only 1 away on the number line.
There were 47 chairs in the room. We had to add 11 more. How many chairs are there now?
58 chairs
Hal had 9 erasers in his desk. Marco had 4 more in his desk.
Rewrite this equation to make a 10
10+3=13
110+11=
121