Powers of 10
5 X 103
5000
What is this number in word form?
564,123
Five hundred sixty-four thousand, one hundred twenty-three
What number is 10 times greater than 50?
500
What property is being shown below.
12 x 7 = 7 x 12
Commutative property of Addition
Use mental math to complete the pattern.
8 × 3 = ___
(8 × 3) × 101 = ____
(8 × 3) × 102 = ____
(8 × 3) × 103 = ____
24
240
2,400
24,000
(5 X 4) X 104
200,000
Write the following number in expanded form
2,565
Possible answers:
(2 X 1000) + (5 X 100) + (6 X 10) + (5 X 1)
(2 X 103) + (5 X 102) + (6 X 101) + (5 X 100)
2000 + 500 + 60 + 5
What number is 1/10 of 6000?
600
What property is being shown below, and what is the final answer?
45 x 8 = 8 x (40+5)
Distributive Property
360
Multiply 40 and 80 using mental math strategies.
3,200
1800
Compare the sixes in the following number:
6,546
The six in the thousands place is 1000 times greater than the 6 in the ones place.
The six in the ones place is 1/1000 of the six in the thousands place
What number is 100 times greater than 200?
What is 20,000
What properties are being shown below and what is the final answer?
(4+23)+0+16 = (4+16)+23+0
Commutative Property of Addition and Associative Property of Addition
Use a basic fact and patterns to solve.
300x60 =
18,000
How would I write 1000 as a power of ten?
103
What is the value of the 5 in the number
6,521
500
What number is 1/100 of 3000?
What is 30
Jacob is organizing his toy cars into rows. He has 23 rows of 8 cars. Show how you can use the Distributive Property to solve how many cars he has?
(20x8) + (3x8) = 160+24 = 184 cars
The average person loses about 8 × 101 strands of hair each day. About how many strands of hair would the average person lose in 7 days?
560 strands
How many zeroes would be in the product of:
(5X6) X 104
5
What is the value of the underlined digit?
12,456,895
Compare the 7s in the following number
747
The 7 in the hundreds place is 100 times the size of the seven in the ones place
Sense or Nonsense?
Julie wrote (15 − 6) − 3 = 15 − (6 − 3). Is Julie’s equation sense or nonsense? Do you think the Associative Property works for subtraction? Explain.
Nonsense; (15 – 6) – 3 = 6, and 15 – (6 – 3) = 12. Because 6 ≠ 12, the Associative Property does not work for subtraction.
Ms. Davies studies a tarantula that is 20 millimeters long. Suppose she uses a microscope to magnify the spider by 4 × 102. How long will the spider appear to be?
8,000 millimeters