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Multiplication Comparisons
Rounding
Place Value
Factors, Prime Numbers, & Composite Numbers
?
100
John has 5 apples. Melissa has 4 times as many apples. How many apples does Melissa have?
Melissa has 20 apples. 5 x 4 = _____
100
Round 374 to the nearest ten.
370
100
7 x ______ = 7,000
1,000 7 x 1,000 = 7,000
100
Which of the following is a prime number? 12, 13, 14, or 15
13 is a prime number. 13 only has two factors, which are 1 and itself (1x13=13)
100
4 thousands + 6 hundreds + 8 ones is ___________ in standard form.
4,608
200
Lucas saved 30 dollars. He saved three times as much money as Fred. How much money did Fred save?
Fred saved $10. ____ x 3 = 30
200
Round 4,825 to the nearest hundred.
4,800
200
60 x ______ = 6,000
100 60 x 100 = 6,000
200
Which of the following is a composite number? 5, 10, 17, or 23
10 is a composite number because it has more than 2 factors (1, 2, 5, and 10). The other numbers are all prime numbers.
200
6, 11, 16, 21, 26, 31, 36, 41... If the pattern continues, which of the following numbers will be in the pattern? 52 65 86 99
86 will be in the pattern. The numbers in the pattern have a 1 or a 6 in the ones place, and 86 has a 6 in the ones place.
300
Tasha had 6 stamps in her collection. Josh had 18 stamps in his collection. How many times as many stamps did Josh have compared to Tasha?
Josh had 3 times as many stamps. 6 x _____ = 18
300
Round 32,854 to the nearest thousand.
33,000
300
30 x 1,000 = _______
30,000 30 x 1,000 = 30,000
300
How many factors does 24 have?
24 has eight factors. 1,2,3,4,6,8,12, and 24 are the factors of 24. 1x24 2x12 3x8 4x6
300
Find the difference. 6,253 - 2,435
the difference is 3,818
400
Caroline made 4 regular pancakes and three times as many chocolate chip pancakes. How many pancakes did Caroline make in all?
She made 16 pancakes. 4 regular, 4x3 chocolate chip. 4x3=12 4 regular + 12 chocolate chip = 16 total pancakes.
400
Round 46,235 to the nearest ten thousand.
50,000
400
Alex has $40 saved for a motorcycle. The motorcycle costs $4,000. The motorcycle is how many times Alex's savings?
The motorcycle is 100 times Alex's savings. 40 x ______ = 4,000
400
Write a number that is both odd and a composite number.
example: 15 is an odd number and a composite number, because is has more than two factors (1,3,5, and 15).
400
If Kevin is 5 years old and Mr. Tarr is 25 years old, How many times as old is Mr. Tarr than Kevin?
Mr. Tarr is 5 times as old as Kevin. 5 x _____ = 25
500
Carmen made $32 selling raffle tickets. That was four times as much money as Kevin made. How much more money did Carmen make than Kevin?
Carmen made $24 more dollars than Kevin. 32 is 4 times as many as 8, because 8 x 4 = 32. So, Kevin made $8. To find out HOW MUCH MORE Carmen made, you must SUBTRACT. $32 - $8 = $24, which is how much more Carmen made.
500
Round 28,486 to the nearest hundred.
28,500
500
How many times larger is the value of the 3 in 7,378 than it is in 2,535
The value of the 3 in 7,378 is 10 times larger the value of the 3 in 8,632. In 7,378 the value of the 3 is 3 hundreds, or 300. In 8,632 the value of the 3 is 3 tens, or 30. The value is 10 times larger because 30 x 10 = 300
500
What factor do all even numbers have in common?
2. All even numbers have 2 as a factor, because if it is an even number, it can be divided into 2 equal groups. Example: 2 is a factor of 18 because 2x9=18. 2 is a factor of 20 because 2x10=20.
500
Mr. Tarr has 12 erasers. Mr. Neal has three times as many erasers. Mrs. Lachance has 4 less erasers than Mr. Neal. How many erasers does Mrs. Lachance have?
Mrs. Lachance has 32 erasers. Mr. Neal has 12 x 3 erasers, which is 36. Mrs. Lachance has 4 less erasers than Mr. Neal, so 36 - 4 = 32. Mrs. Lachance has 32 erasers.