Finding the Missing Part
Solve for: 6 + ? = 17
9
Write the fact family for 6+4
6+4=10
4+6=10
10-4=6
10-6=4
show two strategies to solve for:
11- ?= 5
counting on: 5 +6 = 11
take from ten: 11-5=6
Fill in the missing blank:
12-6= 2+__
4
show the number 17 as a ten and some ones using a numberbond, 5 group drawings and a number sentence
17=10+7
17 circles in a 5 group drawing
17, 10 and 7 in a number bond
solve for: ? + 4= 16
12
Write the fact family for 7-2
7-2=5
7-5=2
5+2=7
2+5=7
show two strategies for: 5+? =13
counting on 5+8= 13
take from ten= 13-5=8
3+4= 8- _
1
Ms.Morel had 10 erasers in a caddy and 3 erasers on her desk. She threw out 6 erasers from the caddy. How many erasers does she have now? Use a labeled math drawing
- Ten frame with caddy as a label and 3 circles labeled desk
-13-6= 7
Write the subtraction related fact for:
2+ ?= 13
13-2=11
write the fact family for 9+8
9+8= 17
8+9= 17
17-9= 8
17-8=9
show two ways to solve for
6 + __= 18
counting on: 6 + 12= 18
Take from ten: 18-6=12
Create a set of equivalent expressions that both equal 12
1+11
0+12
2+10
3+9
4+8
5+7
6+6
True or False:
You will get a different answer if you add 5+2+4 instead of 4+2+5
False, you will get the same answer even if you swap the parts. That is called the commutative property.
fill in the missing blank and write the related subtraction fact:
? + 8= 19
11
19-8=11
What is the related subtraction fact for
7+__=19
19-7=12
show two ways to solve for
15-?= 3
3+12=15
15-3=12
Prove that
14-9 = 13-8
14-9= 5
13-8= 5
5=5
Use the take from 10 strategy to solve 19- 4
19-4=15
Ms.Rivas went to the target in the morning and afternoon. She bought 9 markers. She also bought some more in the afternoon. By the time she got home, she had 16 markers. How many markers did Ms.Rivas buy in the afternoon?
Ms.Rivas bought 7 markers in the afternoon.
Write the fact family for 18-5
5+13=18
13+5=18
18-13=5
18-5=13
show two way to solve for 16-_=6
Counting on 6+10=16
take from 10: 16-6=10
Prove that 15-6 = 17-8
15-6= 9
17-8 = 9
Ms.Brookins had 10 cars in a container and 6 cars outside of the container. She lost 4 cars from the container. How many cars does she have in all now?
14-6=8