Show:
Make a Friendly 10
Doubles
Near Doubles
Borrow a Little to Make a 10
Switcheroo
100
7+9+1=
17
100
4+4=
8
100
6+7=
13
100
8+7=
15
100
What is the "switcheroo" fact for 3+1=4?
1+3=4
200
3+5+5=
13
200
7+7=
14
200
4+5=
9
200
9+3=
12
200
What is the "switcheroo" fact for 9+8, and what is the sum?
8+9=17
300
3+6+7=
13
300
9+9+2=
20
300
7+8=
15
300
8+4=
12
300
What is the "switheroo" fact and sum of 6+5?
5+6=11
400
8+6+2=
16
400
4+8+4=
16
400
7+9=
16
400
9+2=
11
400
What is a "switcheroo" fact and the sum of 6+2+1?
1+2+6=9 or 2+1+6=9 or ...
500
If Alex has 2 dogs, Harini has 8 fish, and Delaney has 7 gerbils, how many animals do they have all together?
2+8+7=17
500
If Lucas has 6 B-Bucks and Ms. Malloy doubles his B-Bucks, how many does he have now?
6+6=12
500
If Olivia has 9 math leftover problems on Tuesday and she has 8 more today, how many does she have in all?
9+8=17
500
If Jerry read 7 pages of his book before lunch and 5 pages after lunch, how many pages did he read all together?
7+5=12
500
What is the "switcheroo" fact for 135+201? *Bonus* What is the sum?
201+135=336