Solve by making tens
37+5 =
37 + 3 =
40 + 2 =
635 + ____ = 652
17
10 + 12 =
22
Mark says that 34 + 46 =70
Do you agree?
Parker found 216 seashells. Then he found 43 more in the sand. How many seashells does Parker have?
259
52 + 9 =
52 + 8 =
60 + 1 =
562 + ____ = 730
168
6 + 18 =
24
Rebecca has $145 and Parker has $275. They wanted to find how much money they have in all.
Rebecca says they have $320.
Parker says they have $420.
Who do you agree with?
Parker. Rebecca did not rename in the tens place.
Some people from School A and School B went to a carnival. 279 people were from School A. 145 people were from School B.
How many people were from the two schools in all?
424
84 + 8 =
84 + 6 =
90 + 2 =
300 + ____ = 425
125
12 + 4 =
16
450 + 365 = 715
Do you agree? Show your work.
no, the answer is 815
A new phone costs $179 and a pair of headphones costs $89. Show with your manipulatives how much money this would be. Write your answer on your whiteboard.
$268
27 + 12 =
27 + 3 =
30 + 9 =
245 + _____ = 443
198
25 + 10
35
467 + 605 = 1012
Do you agree?
no, the answer is 1072
There were 27 rabbits, 16 chickens, and 14 goats in a farm.
Which numbers have digits in the ones place that will make exactly 10?
____________ and ____________
16 and 14
CHALLENGE:
128 + 72 =
128 + 2 =
130 + 70 =
1033 + _____ = 1435
402
15 + 7 =
22
25 + 56 + 37 + 43 = 141
Do you agree?
no, the answer should be 161.
Class A has 22 students.
Class B has 19 students.
Class C has 21 students.
Show different ways to find the number of students in all.
62