math review unit 1
DESCRIPTION
Math Review Unit 1. Tool Check. Vocabulary. Round- to change a number to the nearest place value Friendly numbers- are easy to multiply and divide. They are multiples of 5, 10, 25, 50 or 100. estimation:. An estimate is an educated guess. - PowerPoint PPT PresentationTRANSCRIPT
Math ReviewUnit 1
Tool Check
Vocabulary
Round- to change a number to the nearest place value
Friendly numbers- are easy to multiply and divide. They are multiples of 5, 10, 25, 50 or 100
estimation:0An estimate is an educated guess.
0Round the nearest place value or make numbers friendly (multiples of 5,10, 25, 50, 100)
0Then solve to see if your estimate is close to the exact answer
Rounding RulesFind your place value, underline the digit
Move to the right, circle it-get it?
0-4 the number stays the same5-9 add one to the game
Now flex your muscles like a hero,Numbers to the right turn to zero
All the other numbers stay the sameYo! Now you're a winner in the rounding
game!
Practice:
15879
8576
684389
394439
58943
7489
5623
126554
Vocabulary Sum- answer to an addition problem.
Difference- answer to a subtraction problem.
Practice: 43 + 32 + 44 + 35 =
76,999 − 68,205 =
56,880 + 43,375 =
Practice: British astronomer William Herschel discovered the planet Uranus in 1781. In the year 2015, how long will it have been, rounded to the nearest hundred, since Uranus was discovered?
Satellite orbits vary in their distance from the earth. Orbits can be anywhere from 252,800 to 35,200,000 yards. What is the greatest distance between satellite orbits? Round to the nearest ten thousand to estimate.
Vocabulary
Product- answer to a multiplication problem
Quotient- answer to a division problem.
Practice: 586 X 98 =
5011 X 97 =
68,588 / 990 =
53,838 / 997 =
Practice: There were 7,667,066 passenger vehicles sold in the United States in one year. If the same number of vehicles were sold for each of the next 8 years, how many were sold? Estimate then solve. Explain why your estimate was reasonable.
Vocabulary0 Expression- one or more numbers and symbols that show a certain
value (Whole problem) 0 Base- the number repeatedly multiplied when the number has an
exponent (bottom number)
0 Exponent- the number of times a base number is multiplied by itself (top number)
0 Squared- the result of the operation where a number has been
multiplied by itself (2nd Power)
0 cubed - the result of the operation where a number has been multiplied by itself two times (3rd power)
0 factor - one of two or more numbers that are multiplied
Practice:
23 64
Practice: Expression Equal Factors Standard Form
52
25
33
44
73
0factor - one of two or more numbers that are multiplied
0prime factorization - an expression showing a whole number as a product of its prime factors
3X3X5 0composite number 0a whole number greater than 1 that is not prime 0Prime number- any number who only has 2
factors (itself and one)
Vocabulary
72 96 12
Practice:
18 64 21
Practice: