Get off my Property
Which property says the order of the addends will result in the same sum or product?
Commutative Property
Estimate the sum by rounding to the nearest whole number
3.25+17.65
3+18=21
What place value are the 7's in?
873.76
10 and tenths
How many digits will be to the right of the decimal point after adding together 0.08+0.9
2 Answer is 0.98
Julia: 72.8 minutes
Katelyn: 7.28 minutes
The above shows the number of minutes each student has spent on Lexia. How many more minutes has Julia spent on Lexia than Katelyn?
65.52 more minutes (must have label)
Write an expression which demonstrates the commutative property of multiplication
Answers vary. Sample Answer: 3x2=2x3 or 2x3=6
3x2=6
Estimate by rounding to the nearest ten.
165.2+17.23
190
Solve:
19.27-13.27
6
34.89+0.08
34.97
76.75-34.56
42.19
If I take away value of one addend and give it to another to create numbers that are more friendly I am using which strategy?
Compensation
Estimate by rounding to the nearest hundred
457.234+269
800
Which decimal is the larger number?
9.5 or 9.45
9.5 because 5 tenths is more than 45 hundredths
If you add 176.03+23, will the digits after the decimal point change?
no the answer is 199.03
How do I stack the following problem using the standard algorithm?
23.7-23.67
Answer will be on the whiteboard
(3+2)+7=3+(2+7) is an example of which property?
Associative Property
Estimate to find the difference.
32.57-12.6
Rounded to the nearest whole number: 20
When you are adding and subtracting decimals, how do you determine where the decimal point goes in the answer?
addition and subtraction: line it up and drop it down
Find the sum: 3.12+44.23+12.76+15
75.11
Aydenn has a piece of yarn that is 1.3m long. Daniel has one that is 3.8m long. How much longer is Daniel's yarn in comparison to Aydenn's?
2.5m Answer has to have units
Solve this problem using any property. Name the property or strategy
3.25+19.75+20
Answers vary
Associative: (3.25+19.75) + 20
Compensation 3+20+20
If the question does not indicate which place value to round to, what place value should you always round to before estimating?
Nearest whole number
Manny says the answer to the problem 3.56+33.7 is 6.93. He is incorrect. What is the correct answer and what did he do wrong?
37.26 correct answer and he did not line the decimals up by place value.
Joanna bought an apple for $.25. Teylor bought a pear for $1.25. Mark bought grapes for $1.30 and Miranda bought an orange for $2.12. Mrs Malik gave the lunch lady a $20 bill. How much change did she get back?
$15.08
Jeremy has $40. He buys two cats for $13.75 each. Will he be able to afford both cats? How much money will they cost? Can he afford to buy them beds for $2 each?
Yes he can afford both cats (total is $27.50) Yes, he can buy them the beds