Powers of 10
What is 10 x 10 in exponential form?
102
1m = ______cm
100
How many times do we read a word problem before we try to solve?
at least 2 times
To check my work for division, I can use multiplication because it is the _________ operation.
inverse (opposite)
How long does it take Earth to rotate on its axis?
24 hrs (one day)
What is 103 in standard form?
1,000
13km = ________m
13,000
How do you know if a number is the total?
If that number is being decomposed or we are taking from that number.
What are the 4 letters we should write on our scratch paper when solving a division problem?
DMSB
How long does it take Earth to orbit the sun?
365.25 days
Solve:
5,000,000 divide 10^4
500
802cL = _______mL
8,020
In a word problem what does each mean?
Equal Groups
What if I solved the problem on my test: 453 x 28
How can I check to see if my answer is reasonable?
Use estimation
Why do some stars look bigger and brighter than other stars?
They are closer to Earth.
Solve:
728 x 10^3
728,0000
79,000
We draw tape diagrams to help us solve word problems, so what are the three parts of a tape diagram?
The total, the groups and the size (what goes in each group)
15,808
What are two things that stars produce?
Light and heat
Rewrite this expression using exponential form then solve:
615 x 10,000
615 x 104 = 6,150,000
36km = _____mm
36,000,000
In a word problem, what operation should you use if you read, "how much more...?" or "how many more...?" and why?
Subtraction...because we are comparing and comparing means to find the difference.
Solve
2,496 divide 32
78
What is a watershed?
Any land where it rains