Addition and Subtraction
513+38=
How many flats, longs, and units would be in the answer?
551
5 flats 5 longs and 1 unit
Write each multiplication as division (use first factor as divisor)
14 x 22 = 308
308/14 = 22
Find the greatest whole number quotient and the remainder.
a. 46,822/659
b. 2,122/19
c.222,214/471
a. quotient 71 remainder 33
b. quotient 111 remainder 13
c. quotient 471 remainder 373
True or False
Is the number divisible by 8?
8|24,716
False, because the rule states the last three digits of the number must be divisible by 8 for the entire number to be divisible by 8.
Are the following numbers prime or composite?
a. 331
b. 351
c. 371
a. Prime
b. Composite
c. Composite
42five - 14five =
How many flats, longs, and units would be in the answer?
23five
2 longs and 3 units
Multiply 108 x 3 with pieces in the minimum set.
3 flats 2 longs 4 units
Evaluate the expression.
{200 x (285+25)}/ 22
15,500
True or false is this number divisible by 6?
241,678,269
False because it is not even so not divisible by 2 and the digits does add up to a number divisible by 3 because it adds up to 45 but is not divisible by 6.
Find the Prime Factorization of 1836.
1836 = 2 x 2 x 3 x 3 x 3 x 17
214five + 44five =
How many flats, longs, and units will be in the answer?
313five
3 flats 1 long and 3 units
Multiply 234five x 4five
2101five
Use front-end approximation to approximate each quotient.
7218/2036
7000/2000 = 3 1/2
A number is divisible by 6 if and only if ________?
The number is divisible by 6 if the number is divisible by 2 and 3.
What is the LCM of (14,22)?
154
Is this a Associative Property or Commutative Property for addition?
300+956=956+300
Commutative Property
Multiply 2 x 25 x 79 x 2
7900
Use a calculator to determine the whole number quotient and the remainder.
4568/40
Quotient 114 and remainder 8
Is 3|282,283,424
No, because the digits add up to 35 and 35 is not a number divisible by 3.
Find all of the factors of 75.
(1,3,5,15,25,75)
Regroup 345+278=
3 hundred + 4 tens + 5
2 hundreds + 7 tens + 8
5 hundreds + 11 tens + 13
6 hundred + 2 tens + 3 = 623
The number 1 is called an ______ ____ _________
because when multiplied by another number, it leaves the identity of the number unchanged.
Identity for multiplication
Evaluate each product or quotient. Write the answer in both exponential form and positional numeration.
104 x 103
(10 x 10 x 10 x 10) x (10 x 10 x 10) = 107 = 10,000,000
True or false 8|80
True or false 3∤19
True
True
One light house flashes every 10 seconds, the other one flashes every 12 seconds. If they both flash at the same moment, how long will it be until they flash together again?
60 seconds