Beads (Use a number rack)
(Show 15 beads on a number rack, 5 on top and 10 on bottom)
How many more beads do you need to make 20?
What is 5.
4+5=__
Use Doubles Plus One
9
4+4=8, 8+1=9
10+0=
What is 10
Mark has 3 pet fish. His brother gives him 2 more. How many fish does he have now?
What are 5 fish
3
What is odd
(Show 12 beads on a number rack, 10 on top and 2 on bottom)
How many more beads do you need to make 20?
How many more beads do you need to make 20?
What is 8.
3+4=__
Use Doubles Minus One
7
4+4=8, 8-1=7
10+5=
What is 15
Aiden found 8 rocks on the trail. He lost 2 on the way back home. How many does he have left?
What is 6
14
What is even
(Show 14 beads on a number rack, 5 on top and 9 on bottom)
How many more beads do you need to make 20?
What is 6.
6+7=__
Use Doubles Plus One
13
6+6=12, 12+1=13
10+10=
What is 20
Cindy has 9 flowers. Sara has some others. Altogether they have 12 flowers. How many flowers did Sara have?
What is 3
12+1=__
Is it even or odd?
What is 13, Odd
(Show 7 beads on a number rack, 3 on top and 4 on bottom)
How many more beads do you need to make 20?
What is 13.
7+8=__
Use Doubles Minus One
15
8+8=16, 16-1=15
10+__=16
What is 6.
Jenny has 7 toy cars. Carl has 8 toy planes. How many toys do they have in all.
What is 15
5+2=__
Is it even or odd?
What is 7, Odd
(Show 12 beads on a number rack, 7 on top and 5 on bottom)
How many more beads do you need to make 20?
What is 8
Mark added 8+9 and got 15. He used Doubles Minus One. Did he get the correct answer? If not, what is the correct answer?
8+8=16
16-1=15
No. 8+9=17
(8+8=16, 16+1=17 OR 9+9=18, 18-1=17)
18- =10
What is 8
Jane has 15 balloons. 4 are green and the rest are red. How many red balloons does she have?
What is 11
3+17=__
Is it even or odd?
What is 20, Even