Converting Metric Measurements
How many Milliliters (mL) in a Liter (L)?
1,000 mL= 1 L
Solve:
15 * 9=
15 * 9 =135
Find the area of a rectangle with a width of 4 cm and a length of 20 cm.
4 cm * 20 cm =80 square centimeters
Solve: 20 * 80=_____
Explain your answer including the Basic Fact
20 * 80=1,600
Basic fact 2*8=16
Then move 2 place values using 2 placemarker zeros
Mr Gapp drives 10 minutes to school. Ms. Burns lives 2 times as far from school. How many minutes does it take Ms. Burns to get to school?
It takes Ms. Burns 20 minutes to drive to school.
10 * 2=20
2 kg is equal to how many grams?
2 kg= 2,000g
Solve:
88 * 9=
88 * 9 = 792
A rectangle has an Area of 25 cm2
What is the Perimeter of this shape?P=20 cm
Formula for Perimeter: p=2w+2l or p=w+w+l+l
The rectangle must be a square with 5 cm sides.
(2*5)+(2*5)=10+10=20cm
600 * 40=______
Explain your answer including the Basic Fact
600 * 40=24,000
Basic Fact 6*4=24
Move 3 places with 3 place marker zeros
Mrs. Wright wanted to buy some soymilk. Soymilk is on sale at Deborah's for $2.50. Mrs. Wright has $5.00. How many cartons of soymilk can she buy?
Give an Estimate to check your answer:
She can buy ______ cartons of soymilk.
Did your answer make sense? Tell why (justify your thinking):
Estimate: 500-250=250
She can buy 2 cartons of soymilk.
Example:
I know that 250+250=500, so she can buy 2 cartons.
12 Kg is equal to how many grams?
12,000 g
45 * 21=
Find the perimeter of this rectilinear shape:
Teacher will determine.
800*700=_______
Explain your answer including the Basic Fact
800*700=560,000
Basic Fact: 8*7=56
Move 4 places with 4 place marker zeros
Mrs. Wright wanted to buy some oatmilk. Oatmilk is on sale at Deborah's for $3.25. Mrs. Wright has $10.00. How many cartons of oatmilk can she buy?
Give an Estimate to check your answer:
She can buy ______ cartons of oatmilk.
Did your answer make sense? Tell why (justify your thinking):
Estimate:10/3=3 1/3
3*3=9
She can buy 3 cartons of oatmilk.
Justify:
3*4=12. She can't buy 4.
3*3 =9. $3.25*3= $9.75 (you can also draw this out)
21 L = ____mL?
21 L = 21000 mL
Fred solved problem #3.
He wrote on his test: 45 * 21= 495
Is he correct or incorrect? Explain your rational. Explain Fred's thinking as well. Your teacher will determine if you have justified your thinking.
He is incorrect. A complete answer should include:
the correct answer: 45 * 21 =945
Fred might have mis-transcribed his work (mixed up the digits).
estimate: 50 * 20= 1,000 so Fred's answer is too low!
Basic Fact 45 * 2= 90, so 45 * 20=900, and 20 is one less than 21, so Fred's answer is definitely too low.
Find the are of the same rectilinear shape from problem #3
Teacher will determine
Use basic facts to find the area of a rectangle with a length of 800 cm and a width of 40 cm. Explain your thinking.
Area=32,000
Basic Fact: 8*4=32
800*40=32,000: Moving 3 places from the Basic Fact using place marker zeros
Mr. Gapp is buying a new snowblower for his house. The snowblower costs $589. Mr. Gapp pays in cash and uses four $100 bills, eighteen $10 bills, and thirty-two $1 bills.
How much did Mr. Gapp pay?
Did he pay the exact amount, too little, or too much? Explain:
He paid
(4*100)+(18*10)+(32*1)=
400
180
+ 32
_______
$612.00
He overpaid by $23.00
Convert
16 kg = _______ gb) Explain how you found how many grams are in 16 Kg.
a) 16 kg= 16,000 g
b) *determined by teacher
89 * 23=_____
First show an estimate to check your work.
Then solve.
estimate: 90*20=
(9*2=18, move 2 place values by tacking on the place marker zeros: 90*20=1800)
89*23=2047
20*80=1600
20*9=180
3*80=240
3*9=27
Find the area and perimeter of the rectilinear shape (hint: check all sides!!!)
Teacher will determine
Solve:
800 * ______=72,000
800*90=72,000
Julia, Elinor, and Sachiko drive together to a soccer tournament. Julia drives for 35 miles. Elinor drives two times as far as Julia. Then Sachiko drives three times as far as Julia and Elinor combined which gets them to the tournament.
How far did Sachiko drive?
Give an estimate first to check your answer.
Give a number model with unknowns
Justify your answer with an explanation
Estimate: 3*((2*30)+30)=270
Number Model: 35+ (2*35)=E; 105*3=S or
3*((2*35)+35)=S
Because:
Julia=35 miles
Elinor=70 miles (2*J)
J+E=35+70=105
S=3*(J+E)=3*105=315
Sachiko drove 315 miles