Show:
Addition Properties
Hundreds Chart
Mental Math
Rounding/Estimating
Paper/Pencil Addition
100
Fill in the missing number: 3+7=_+3
7
100
How many rows do you move down to add 10 to any number on a hundreds chart?
One row
100
How would I break apart 17?
10+7
100
What is 26 rounded to the nearest ten?
30
100
Find the sum: 28+34=
62
200
What property is represented by this number sentence?: 8+4=4+8
The Commutative (Order) Property
200
What number would you start on if you were solving this problem using a hundreds chart?: 76+67=
76
200
What is the next step in this problem to arrive at the correct sum?: 34+65= (30+4)+(60+5)=
Add the ones (4+5=9) Add the tens (30+60=90) Combine the tens and the ones (90+9=99)
200
What is 949 rounded to the nearest hundred?
900
200
Find the sum, show entire number sentence using base-ten blocks. 133+87=
(1 hundreds block+3 tens+3 ones)+(8 tens+7 ones)=(2 hundreds blocks+2 tens) 133+87=220
300
What property would you use to find the missing number?: (3+4)+5=_+(4+5)
The Associative (Grouping) Property
300
If you wanted to add 45 to any number on the hundreds chart, what moves would be made?
1. Move down 4 rows. 2. Move to the right 5 spaces.
300
How would I solve this problem by making a ten?: 57+24=
Turn 57 into 60 by taking 3 ones from 24, making it into 21. (60+21=81)
300
What is the estimated sum of 536+393, rounding to the nearest hundred?
900
300
Estimate. Find the sum. 268+422=
Estimate: 300+300=700 Actual Sum: 690
400
What property is represented in this number sentence?: 19+0=19
The Identity (Zero) Property
400
What number do I start on if I am adding 52+40 on a hundreds chart?
52
400
To add 32+56, Sydney first added 30+50. What two steps does she still need to do to find the sum? What is the sum?
She needs to add 2+6=8 80+8=88
400
Round this number to the nearest ten: 4,345
4,350
400
Find the sum: 142+297+116=
555
500
Give an example of a number sentence that is a representation of the Associative (Grouping) Property.
Answers will vary. Must contain parenthesis and grouped numbers.
500
To find 38+45, you could first find 38+50+88. Then what should you do?
You should subtract 5.
500
How can Nate add 48+34 by making a ten? What is the sum?
Nate can break apart 34 as 32+2, so he can make a ten by adding 48+2=50. Then he can add 50+32=82.
500
Kate estimated 270+146 and got 300. Is her estimate correct? Explain.
No. If you round to the nearest hundred to estimate is 300+100=400. If you round to the nearest ten the estimate is 270+150=420.
500
Find the sum: 90+105+110+150=
455