Multiples of 10 x Decimal
10 x 0.8
8
0.2
0.20 x 0.5
0.1
False
Mr. Ziggy bought 6 passes for his family to attend the county fair. Each of the six family members got a souvenir at the fair. The passes cost $17.25 each and the souvenirs were $3.99 each. How much did Mr. Ziggy spend at the county fair?
Mr. Turner spent $127.44 at the county fair.
102 x 4.6
460
6 x .5
3
0.44 x 0.08
0.0352
True Or False: The 0 after the decimal can be ignored in a whole number Ex: 34.0
True
SPIRAL BACK!!!!
Mrs. Reyes has 200 pencils for her class. She gives each of the 32 students the same number of pencils. How many pencils will she have left?
8 pencils LEFT!!
2.98 × 103 =
2980
.3 x 23
6.9
1.2 x .02
0.024
Where does the decimal point go in the product? Explain how you know
9.01 x 8.3 = 7 4 7 8 3
74.783
The decimal point is placed 3 place values from the right. There are two place values in the first factor and one more place value in the second factor.
Which of the following are equivalent (EQUAL) to the expression 0.78 × 102?
a.) 0.78 × 100
b.) 7.8 × 10
c.) 78 × 10
d.) 78
e.) 780
a.) 0.78 × 100
b.) 7.8 × 10
and
d.) 78
.038 x ? = 380
1000 or 103
42 x 2.2
92.4
Brooklyn buys 10 bags of stickers for $8.55 per bag and 100 re-sealable bags for $0.19 each. How much did Brooklyn spend in all?
$104.50
(10 x $8.55 = $85.50) + (100 x $0.19 = $19)
If you multiply two decimals less than one (Ex: 0.8 or 0.003), can you predict whether the product (answer) will be LESS than or GREATER than either of the factors?
LESS! When you multiply any factor by something less than 1, the product (answer) will be smaller
Starbucks uses 34.75 liters of milk a day. Assuming Starbucks uses the same amount of milk every day, about how many liters of milk should the manager order for a seven-day week? Show how you estimated
About 245 liters
7 × 34.75 is about 7 × 35 = 245
What power od 10 makes the equation true?
70.7 × 10? = 70700
103
Noah has pieces of cardboard that are each 0.52 centimeter thick. If he stacks 15 pieces of cardboard on top of one another, how thick will the stack be? Use number sense to decide.
7.8 cm
.028 x 3.25
0.091
Neyla bought 5 lilies and 3 roses. Lilies cost $0.75 each, and roses cost $0.65 each. The rest of the flowers she bought were carnations. If Neyla spent a total of $7.05 on flowers, how much money did she spend on carnations?
$1.35 on carnations
Mr. Williamson is buying lunch at the sandwich shop for his family. He buys three veggie wraps and one grilled cheese. Veggie wraps cost $4.25 and grilled cheese costs $3.49. How much money did Mr. Williamson spend in all?
Mr. Williamson spent $16.24 for all the sandwiches.
($4.25 x 3) + $3.49 = $16.24