Rounding
If Bob rounds her number of flowers to the nearest ten, she would have 260. How many cards could she have in her collection?
A. 259
B. 252
C. 268
D. 249
A. 259
Susie wants to add 23 + 30 on a hundred chart. She starts at 23. What steps does she follow next?
A. Count to the right 3 squares
B. Count to the left 3 squares
C. Count down 3 rows
D. Count back 3 rows
C. Count down 3 rows
An ice cream stand sells 36 vanilla ice cream cones and 29 strawberry ice cream cones. How many ice cream cones did they sell altogether?
65
What property is shown?
3 + 0 = 3
Identity
Bob drew 2 roses and then 3 sunflowers. He repeated the pattern of 5 flowers until he drew a total of 12 sunflowers. How many tulips did he draw?
8
Round 569 to the nearest hundred.
600
Use a hundreds chart to add 34 + 47
81
A rancher has 393 cattle and 523 hogs on his ranch. How many animals does the rancher have in all?
916
What property is shown?
3 + (4 + 5) = (3 + 4) + 5
Associative
Fill in the missing number:
3 + ___ = 3
0
Round 295 to the nearest ten.
300
Billy wants to add 36 + 43. Show how Billy can add the two numbers using the breaking apart strategy.
30 + 40 = 70
6 + 3 = 9
70 + 9 = 79
A supermarket has 290 cans of soup and 349 packages of instant soup. How many containers of soup are there in all?
639
What property is shown?
3 + 6 = 6 + 3
Commutative
Fill in the missing number:
3 + (7 + 5) = (3 + __) + 5
7
Carol walks up 452 steps to get to the top of lookout tower. What is 452 rounded to the nearest hundred?
500
Sam jogs for 21 minutes on Monday. He jogs for 36 minutes on Tuesday. Use mental math to find how many minutes Sam jogs in all.
57
1168
What property is shown?
24820 + 0
Identity
Fill in the missing number:
2 + 8 = __ + 2
8
A train going into Boston has 216 passengers. A train going out of Boston has 127 passengers. Which is the best estimate for the total number of passengers on the two trains?
350
Add 50 + 29 on a hundreds chart.
79
There are 749 dogs at the pound and 243 cats. How many animals are there in all?
992
What property is shown?
23 + (2 + 6) = (23 + 2) + 6
Associative
5 + (10 + 4) = 5 + ____
14