Clock it
What is the first step to take before multiplying these numbers? (Explain the step. You do NOT need to solve.)
3.28 x 4.1
"Change the numbers to whole numbers" (OR) explain as moving the decimal 2 spaces right on 3.28 and 1 space right on 4.1 so they are 328 and 41.
Solve:
0.2 × 0.21 =
0.042
A pack of gum weighs 0.8 ounces. If Keily has 7 packs, how many ounces do they weigh in total?
5.6 ounces
P.S. No gum in class!
Harper has a baby giraffe that is 1.7 meters tall. An adult giraffe is 2.5 times taller. How tall is Eileen's adult giraffe?
4.25 meters
What am I called?:
The answer to a multiplication problem is the.....
Product
(Example: In 5 × 6 = 30, the product is 30.)
How does the decimal point move when multiplying 79.816 × 103? (*Hint: Does the number get bigger or smaller?)
It moves 3 places to the right because 103 is the same as saying 10 x 10 x 10.
79.816 × 103 = 79816
Find the missing piece:
0.06 x _____ = 0.042.
0.7
Araya has a rat that weighs 0.6 pounds. A rabbit weighs 4 times as much as the rat. What is the weight of the rabbit?
2.4 pounds
A hummingbird drinks 0.45 ounces of nectar per hour.
It feeds for 9.5 hours during the day. How much nectar does it drink?
4.275 ounces
What am I called?
A number that is multiplied by another number is called a.....
Factor
(Example: In 7 × 8 = 56, both 7 and 8 are factors.)
How do you determine the area of an object?
Area = Length x Width
Solve:
129.4 × 0.01 =
1.294
A pack of gum costs $1.25. A store sells 8 packs in the morning and 6 packs in the afternoon. How much money did the store make from gum sales?
$17.50
A mountain bike trail is 2.75 miles long. Emmett rides the trail 6.4 times during the week. How many miles did Emmett ride?
17.6 miles
What is this called?
You can switch the order of the numbers in multiplication and get the same answer.
(Example: 3 × 5 = 5 × 3 )
Commutative Property
How do you determine the perimeter of an object?
Perimeter = Length + Length + Width + Width
True or False
129.4 × 101 = 1,294
True
Mrs. Pitts has a living room rug that is 4.7 feet wide and 8.92 feet long. What is the area of her rug?
41.924 square feet
Mrs. Pitts is building a garden. The garden is 8 feet wide and 12 feet long. How much fencing would be needed to cover the perimeter of the garden?
8 + 8 + 12 + 12 = 40 feet
What is this called?
Decimals that have the same value but look different.
Example: 0.5 = 0.50 = 0.500
Equivalent Decimals
Give a respectful and genuine compliment to each person in your group.
You get points if you did it respectfully and genuinely to EACH person in your group.
Two parts:
A.) Is 3 × 0.99 greater or less than 4?
B.) What is the answer?
A.) Less than 4
B.) 2.97
Ziggy's parents gave him $15 to spend at the state fair. He bought a snow cone for $2.25, and a ticket to the fair cost him 5 times that amount. How much does he have leftover?
$1.50 left over.
Jerry the groundhog loves berries. Every morning, he collects and saves 2.5 pounds of berries. He collects berries for 8 days straight. Then he shares half of his berries with his friend, a chipmunk named Chip. How many pounds of berries does Chip get?
10 pounds of berries
(2.5 x 8 = 20, then split into half = 10)
What is this called?
The value of a digit depending on its position in the number.
Example: In 5.46, the 5 is in the ones place, the 4 is in the tenths place, and the 6 is in the hundredths place.
Place Value