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 0.10- 0.90 are located in which place value?
Tenths
Name 3 other way to say subtraction.
Possible Responses:
- Take away
- Difference
- less than
-left over/ remaining
Nancy gave hints to her friend to help figure out how many spiders were in her collection. The hint was there was 64 total legs. How many spiders does she have?
8
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 100-900 are located in which place value?
Bonus:
The number 1,000 is located in which place value?
Hundreds
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
A cat, 6 kittens and a three legged dog named Tripod are sitting on a bed. How many legs are there?
31 legs 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