All that and a bag of chips!
Name that Decimal!
What's that Place Value?
Estimation, Estimation, Estimation
Addition and Subtraction
100
What is this called?
Hundredth Grid
100
Read this Correctly:
3.1
Three and One Tenth
100
What is the value of the 9 in the number 492?
Ninety. It is in the tens place.
100
Estimate the difference to the nearest ten:
279.1 - 243.5
280 - 240 = 40
100
1.35 + 5.65
1.35 + 5.65 = 7
200
What are compatible numbers?
Compatible numbers are numbers that are easy to compute mentally
200
Read this Correctly:
5.25
Five and Twenty Five Hundredths
200
How do you write .044 in a fraction? How do you know?
44/1000
The decimal ends in the thousandths place
200
Estimate the sum:
59 + 43.6
59 + 44 = 103
200
34.7 + 1.1 + 1.3
34.7 + 1.3 = 36
36 + 1.1 = 37.1
300
True or False:
This represents the Associative Property
($11.45 + $9.55) + $3.39
$11.45 + ($9.55 + $3.39)
True. The Associative Property lets you change the groupings of addends.
300
Write this in decimal form:
Twenty Five AND Nine Tenths
25.9
300
Is the value of the two 7's in the decimal .77 the same? Explain.
No the first seven is in the tenths place and the second seven is in the hundredths place.
300
Three rock samples have masses of 45.6 grams, 10.1 grams, and 36.9 grams. A scientist estimates the total mass of the samples by rounding each mass to the nearest whole number. What are the estimated numbers that he will add?
45, 10, 37
300
Estimate to the nearest whole number and then complete.
546.76 - 67.12
547 - 167 = 380
400
What are some ways you can check your final answer?
Hundredth grid
subtract/add the opposite numbers
400
Read this Correctly:
678.42
Six Hundred Seventy Eight and Fourty Two Hundredths
400
Round to the nearest thousandth
12.0874
12.087
400
Estimate the difference
80.01 - 2.89
80 - 3 = 77
400
Use mental math to find the sum
$12.15 + $16.85 + $1.74
Step 1: $12.15 + $16.85 = $29.00
Step 2: $29.00 + $1.74 = $30.74
500
In a hundredth grid, show me the following problem:
.5 - .1
(See student work)
500
Challenge. Read this Correctly:
123.456
One Hundred Twenty Three AND Four Hundred Fifty Six Thousandths
500
Round this number to the nearest tenth:
1,456,078.631
1,456,078.6
500
Miss Steel needs to go to the grocery store. She has $25 to spend. She wants a 12 pack of Coke for $3.50, a value box of Ham and Cheese Hot Pockets for $11.87, and a bag of treats for her dog Bean for $5.92. Estimate the final total to the nearest hundredth. Does Miss Steel have enough?
$4 + $12 + $6 = $22
Miss Steel has just enough money to buy her groceries.
500
45.6 + 95.2 - 68.0
45.6 - 95.2 = 140.8
140.8 - 68.0
72.8