Double Digits
Find the sum.
24 + 35 =
59
20 + 30 = 50
4 + 5 = 9
50 + 9 = 59
Fill in the blank for the fact family.
3 + 7 = 10
7 + 3 = 10
10 - 3 = 7
10 - __= 3
7
Find the sum.
21 + 11 =
*show your work using a tens number strategy
32
21 + 10 = 31
31 + 1 = 32
Mrs. Mullin had 9 scarves. She gave 3 to Ms. Loeb and 1 to Ms. Stutman. How many scarves does Mrs. Mullin have left?
5 scarves
9 - 3 = 6
6 - 1 = 5
Draw greater than, less than or equal to.
10 + 5 ___ 6 + 10
10 + 5 < 6 + 10
Find the sum.
19 + 30 =
49
10 + 30 = 40
40 + 9 = 49
What is the missing sentence for the fact family?
4 + 11 = 15
11 + 4 = 15
15 - 11 = 4
_____________
15 - 4 = 11
Find the difference.
76 - 12 =
*show your work using a tens number strategy
64
76 - 10 = 66
66 - 2 = 64
Mrs. Duca made cookies for herself and her 4 friends to share. She made 40 cookies. Each person had 5 cookies. How many were left over?
There are five people sharing (Mrs. Duca plus her 4 friends). If each person has 5 cookies, then
5 + 5 + 5 + 5 + 5 = 25
40 - 25 = 15
35 + 9 ___ 34 + 10
35 + 9 = 34 + 10
Which answer is most reasonable for the subtraction sentence? Be ready to explain!
65 - 43 =
40 B.62 C. 22
C. 22
If we look at the ones, we can see 5 -3 = 2 so A would not make sense. If we notice the tens we know 60 - 40 is 20, so B does not make sense.
What is the missing sentence for the fact family?
12 + 16 = 28
___________
28 - 16 = 12
28 - 12 = 16
16 + 12 = 28
84 - ___ = 65
19
84 - 20 = 64
64 + 1 = 65
84 - 19 = 65
Mrs. Schnyer has 18 markers in her desk. 10 are thick. 4 of her skinny markers are green. How many of her skinny markers are not green?
If Mrs. Schnyer has 18 total markers and 10 are thick, that means 8 are skinny. If 4 skinny markers are green, that means 4 are not green.
55 - 12 ___ 55 - 22
55 - 12 > 55 - 22
Find the difference.
73 - 59 =
14
If we look at the ones, we cannot take 9 from 3 but we can take 9 from 13 which equals 4. We are left with
60 - 50 = 10.
10 + 4 = 14
Write the fact family sentences for these numbers:
4, 9, 13
4 + 9 = 13
9 + 4 =13
13 - 9 = 4
13 - 4 = 9
___ + 41 = 57
16
10 + 41 = 51
6 + 51 = 57
16 + 41 = 57
Ms. Brigante has 7 green pencils. She has 25 more purple pencils than green. How many pencils does Ms. Brigante have altogether?
7 + 25 = 5 + 25 + 2 = 32 purple pencils
7 green pencils + 32 purple pencils = 39 pencils total
19 + 5 ___ 29 - 2
19 + 5 < 29 - 2
Find the solution.
13 + 41 - 25 =
29
13 + 41
10 + 40 = 50
3 + 1 = 4
50 + 4 = 54
54 - 25
14 - 5 = 9
40 - 20 = 20
20 + 9 = 29
Create your own fact family! Remember to write all the sentences!
Many options*
34 - 17 =
17
34 - 20 = 14
14 + 3 = 17
20 - 3 = 17
Mrs. Kaplan ran 10 miles. Her friend Sara ran 6 more miles than she did. Her friend Courtney ran 2 fewer miles than Sara. How many miles did Courtney run?
10 + 6 = 16 miles - Sara ran
16 - 2 = 14 miles - Courtney ran
70 - 15 ___ 65 + 10
70 - 15 < 65 + 10