Vocabulary
Putting two values together gives a total value.
Adding
Without using the word 'adding,' describe adding.
Possible Response(s):
- Putting things together
- Finding the total of something
What is the difference from:
354+48 and 354-48
The first value is being added, while the second value is being subtracted.
How is adding different from subtracting?
Adding adds a value and Subtracting takes a value away.
1000+987
1,987
Taking a smaller value from a bigger value.
Subtracting
Without using the word subtracting, describe 'subtracting.'
Possible Response(s):
- Taking a value away from another value
- Removing a value away from another value
What strategies are being used to solve the problem:
456+398
1 1
400+50+6
300+90+8
= 854
Expanded Form
Will 98 + 45 give you the same answer as 98 - 45?
Why?
Show your work.
No.
98 + 45 = 143 by adding and 98 - 45 = 53 by subtracting.
786 - 597
189
The numbers from 0-9 are located in which place value?
Ones
What is the commutative property of addition?
Values can be added in any order.
ex: 4+5 = 9 and 5+4 = 9
(a+b=b+a)
Place the number in their correct place values:
694
Thousands | Hundreds | Tens | Ones
Thousands | Hundreds | Tens | Ones
6 9 4
Does 942 - 765 have the same number of place values as 1,000 - 0?
Show your work.
No.
942 - 765 = 177 = 3 place values
Thousands | Hundreds | Tens | Ones
1 7 7
1,000 - 0 = 1,000 = 4 place values
Thousands | Hundreds | Tens | Ones
1 0 0 0
16 + 754
770
The numbers from 10-90 are located in which place value?
Tens
Name 3 other way to say subtraction.
Possible Responses:
- Take away
- Difference
Name the parts of the subtraction problem:
674 - 23 = 651
674 - 23 = 651
Minuend Subtrahend Difference
How does 'in all' and 'less' show addition and subtraction?
Possible Response(s):
'In all' shows a total and 'Less' shows a value was taken away from a total.
1,000-543
457
The numbers from 11000-99900 are located in which place value?
Bonus:
The number 100,000 is located in which place value?
ten thousands
hundred Thousands
What are we working on?
Hint:
California State Standards for Math
2. Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction
Possible Response(s):
- 3rd grade adding and subtracting
- Number and Operations in Base Ten
Name the parts of the addition problem:
845 + 23 = 1,068
845 + 23 = 1,068
Addend Addend Sum or Total
Chose any one adding and any one subtracting strategy and compare them.
Show your work.
Bonus:
Points will be given for those who use strategies not already presented.
Responses will vary
762 + 95
Bonus:
584 - 98
857
Bonus:
486