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RegistrationReview Math from this WeekToday:
Registering at the Khan Academy
Warm-Up: Number SenseLarge & Small Numbers1. What number
comes after a trillion?2. How many millions in a billion?Write your
answer in numbers and words:3. How far is a one-way trip from the
Earth to the Sun?4. Each time a comma is added to a number, we have
multiplied by what number?
Write your answer in numbers and words:5. In inches, what is the
average width of a human hair?A thousand hairs lined up is how
long?Write your answer in numbers and words:7. In seconds, how long
does it take a hummingbird to flap its wings one time?6. In one
second, how many times can a hummingbird flap its wings?
Warm-Up: Number SenseLarge & Small Numbers
Large & Small Numbers: Answers1. What number comes after a
trillion?A Quadrillion2. How many millions in a billion?Write your
answer in numbers and words:3. How far is a one-way trip from the
Earth to the Sun?100020,420,060,000 milesTwenty billion,
four-hundred twenty million, sixty-thousand miles. (and is not a
number)4. Each time a comma is added to a number, we have
multiplied by what number?1,000
Write your answer in numbers and words:5. In inches, what is the
average width of a human hair?0.007 inchSeven -Thousandths of an
inchA thousand hairs lined up is how long?Write your answer in
numbers and words:7. In seconds, how long does it take a
hummingbird to flap its wings one time?7 inches0.1 secondsOne-tenth
of a second6. In one second, how many times can a hummingbird flap
its wings?10 timesLarge & Small Numbers: Answers
End of Week Review:1. 5 + 7 = 12; 5 = 2. 12 7 = 5; 12 =3. 8 * 4
= 32; 8 = 5. Translate The difference between a number and four.
The sum of three times a number and eight. Four less than the
product of four and a number is nine. The quotient of a number and
eight is one and five-tenths.The difference between four and a
number. Translate & Solve:
Number Relationships & Problem SolvingWhen solving for
unknown quantities, always assign the variable to the smallest
quantity. (Smallest may be lightest, least expensive, shortest,
etc. Solve Algebraically:4 more than the sum of two consecutive odd
numbers is 80Three more than the sum of two consecutive numbers is
202.And the last problem this week......
Bob weighs 10 more pounds than Mike. Don weighs 15 more pounds
than Bob. The sum of their weight is 440 pounds. How much does each
weigh?Who weighs the least?Well use m as the variable. Now, the key
part of our solution: For the other two, what are their weights in
relation to Mikes weight? Bob is...m + 10Don is...m + 10(Bob) + 15,
orm + 25Putting them all together, we have...m + (m + 10) + (m +
25) = 4403m + 35 = 4403m = 405Mike = 135, Bob = 145, Don = 160
