Multi-Digit
Multiplication
Multiplication
Multiply 985 * 16
(see #1, p15)
15,760
Divide 96/13 = _________
(see #1, p16)
7 R5
At Summit Academy Middle School, there are 37 classrooms with 28 desks in each. About how many desks are there?
Round 37 to ______ and round
28 to ______.
There are about ______ desks.
(see #2, p19)
37 rounds to 40,
28 rounds to 30,
There are about 1200 desks.
Prime Factorization
(see #1, p20)
Find the prime factorization of 48 using a factor tree.
Write it as a product of prime factors.
2 * 2 * 2 * 2 * 3
The least common multiple is the smallest multiple set of numbers has in common.
Find the LCM by listing the multiples of each number until you find the first one that is shared:
Find the LCM of 12 and 40
(see #5, p24)
LCM = 120
Multiply 1,251 * 36 = ____________
(see #3, p15)
45,036
Divide 913/18 = _________
(see #6, p16)
50 r13
There are 712 books to be shelved in the library. Each shelf holds 24 books. About how many shelves will be used?
Round 712 to ______ and round 24 to _______
About ________shelves will be used.
(see #3, p19)
712 rounds to 700,
24 rounds to 20,
About 14,000 shelves will be used
A common factor is a divisor that is shared by two or more numbers. For example, 2 is a common factor of all even numbers. The greatest common factor is the largest common factor shared by the numbers.
Find the GCF between 24 an 16 (see #3, p21)
GCF = 8
Find the LCM of 7 and 8
(see #4, p 24)
LCM = 56
Multiply 374 * 312 = ________
(see #6, p15)
116, 688
Divide 6,590/19 = _________
(see #3, p17)
346 r16
Mya's family is taking a car trip to see her grandparents. The family plans to spend 3 days on the road. They have to travel 627 miles. About how far must they drive each day?
Round 627 to ________
They must travel about ______ miles each day.
(see #4, p19)
627 rounds to 630;
630 * 3 = 1,890
Find the GCF for 16, 48, and 64
GCF = 16
Find the LCM of 10, 14, and 28
(see #7, p25)
LCM = 140