Powers and Exponents
What is the multiplication expression for the exponential form?
103
10 x 10 x 10
32 x 102
3200
If a math sentence says "about how much" that means you should _____ the numbers.
round
Solve doing an Area Model.
23 x 45
23 x 45=1,035
23 x 45
23 x 45=1,035
What is the exponential form?
10 x 10 x 10 x 10
104
57 x 104
570,000
Round both numbers then multiply.
643 x 18
600 x 20= 12,000
Solve doing an Area Model.
54 x 63
54 x 63=3,402
35 x 32=
35 x 32=1,120
What is the exponential form of the power of 10?
1000
103
What is the unknown factor?
43 x ______ = 4,300,000
105
Round both numbers then multiply.
572 x 49=
600 x 50=30,000
Solve doing an Area Model.
324 x 76
324 x 76=24,624
354 x 23
354 x 23=8,142
True or False.
105= 50
If false, what is the correct answer?
False.
100,000
Describe the pattern when multiplying by powers of 10.
For example 105= 100,000
The number of exponent is the same number of zeros
The town library has 478 shelves. Each shelf holds 48 books. About how many books does the library have?
500 x 50=25,000
A school collected 128 boxes of canned food. Each box has 45 cans. How many cans of food did the school collect?
128 x45=5,760
A store sold 12 mountain bikes and scooter packages for $367. How much money did they make?
367 x 12=4,404
Grace reviewed 106 lines of a computer program. How many lines did she review?
1,000,000
Find the unknown factor.
? x 105= 56,300,000
563
The school bake sale sold 405 baked goods for $12 each. About how much did the bake sale earn?
400 x 10=4,000
Use the method from yesterday.
9736 x 3
9736 x 3=29,208
Use the method from yesterday.
13802 x 3
13802 x3=41,406