________ 58 __________
Ten less Ten more
48, 68
What is the sum?
12 + 24 + 33 =
69
_____l______l______l______l______l______l_____
35 __ __ 38 39 __
36, 37, 40
There are 18 butterflies on the bush. 12 more join them. How many butterflies are there?
Solve the problem and explain your thinking.
30
Accept reasonable explanations.
Some students are on the bus. 23 more students get on the bus. Now there are 39 students on the bus. How many students were on the bus to start? Use drawings and equations to show your thinking.
16
For a correct answer they must have an equation AND show how they solved the problem.
10, 20, 30, _____, ______, _______
What are the next three numbers in this pattern?
40, 50, 60
What is the sum?
34 + 32 + 23 =
89
_____l______l______l______l______l______l_____
77 __ __ 80 81 __
78, 79, 82
There are 36 butterflies in the garden. 37 more join them. How many butterflies are there?
Solve the problem and explain your thinking.
73
Accept any reasonable explanations.
Ms. Cockrell's class has 12 stars on their star board. Ms. Moore's class has 9 more. How many stars does Ms. Moore's class have? Use drawings and equations to show your thinking.
21
For a correct answer they must have an equation AND show how they solved the problem.
46, 56, 66, _____, ______, _______
What are the next three numbers in this pattern?
76, 86, 96
What is the sum?
28 + 21 + 32 =
81
_____l_________________l____________l____
0 60
Place the following numbers on the number line:
30, 70, 80
_____l________l________l____l____l____
0 30 60 70 80
Tolby solved the problem 22 + 48 by adding
20 + 40 +2 + 8. Is Tolby's strategy correct?
Explain why or why not.
Yes
Accept any reasonable explanations.
Some students were in the cafeteria. 17 more students came into the cafeteria. Now there are 98 students in the cafeteria. How many students were in the cafeteria at first? Use drawings and equations to show your thinking.
81
For a correct answer they must have an equation AND show how they solved the problem.
31, 41, 51, _____, ______, ______
What are the next three numbers in this pattern?
If the pattern continues will the number 94 be a part of this pattern? Tell how you know.
61, 71, 81
No, because only the tens place is changing when I count by 10's. The one's place has to be "1".
What is the sum?
37 + 27 + 31 =
95
There were 58 students on the bus. 25 students got off the bus. How many students are on the bus? Use a number line to show your thinking.
33
Students will show their number lines and explain the jumps.
Joseph solved the problem 85 - 23 = ______ by writing, "I know that I need to add 2 to the 3 to make 5. And I need to add 60 to 20 to make 80. The answer is 62." Is Joseph's strategy correct? Explain why or why not.
Yes
Accept any reasonable explanation.
On the first day, Ms. Cecil's class raised $88 for the Read-a-thon. Ms. Bergen's class raised $9 more. How much money did Ms. Bergen's class raise on the first day? Use drawings and equations to show your thinking.
$97
For a correct answer they must have an equation AND show how they solved the problem.
37, 47, 57, _____, ______, ______
What are the next three numbers in this pattern?
If the pattern continues will the number 97 be a part of this pattern? Tell how you know.
67, 77, 87
Yes, because only the tens place is changing, so the ones are always "7".
What is the sum?
38 + 32 + 44 =
114
Jade read for 28 minutes on Monday and 35 minutes on Tuesday. How many minutes has he read so far this week? Use a number line to show your thinking.
63
Students will show their number lines and explain the jumps.
Cole earned Cowboy Points at school. He earned 15 tickets for Safety, 18 points for Respect, and 22 points for Acting Responsibly. To find out how many tickets he has in all, Cole first adds 18 and 22. Why might this be a good strategy?
Adding 18 and 22 first is a good strategy because they have "Friendly Numbers" in the ones place equalling 10.
Caryn is 48 inches tall. Hafsa is 5 inches taller. How tall is Hafsa? Use drawings and equations to show your thinking.
53
For a correct answer they must have an equation AND show how they solved the problem.