Expressions
Comparing Numbers
Multidigit Multiplication
Word Problems
Mystery Problem
100
What is an expression
A mathematical sentence involving numbers, operations, and variables
100
What symbols do we use to compare numbers?
<, >, =
100
What is a multidigit number?
A number with more than one digit.
100
What is the first thing we should do when solving a word problem?
Underline important information
100
Who is the best teacher in the world
Mr. Hickman duhhhhhhh!!!!! :)
200
Write this expression: "6 times the sum of 3 and 9"
6 x (3 + 9)
200
Do you always have to calculate to find which expression is larger? Why or why not?
You do not have to calculate complete answers to determine which is larger. An obvious example would be 23 x 12 compared with 20 x 12.
200
Solve 45 x 67 using an area model.
3015
200
For a field trip, the school bought 47 sandwiches for $4.60 each and 39 bags of chips for $1.25 each. How much did the school spend in all?
264.95
200
Solve: the sum of 560 and 440 times 14
14,000
300
Write the sentence to the expression: (43 - 17) x 5
the difference between 43 and 17 times 5
300
Compare without calculating... 100 x 8 ______ 25 x (4 x 9)
100 x 8 ___<___ 25 x (4 x 9)
300
Solve through estimation (without the standard algorithm or an area model) 49 x 11
50 x 11 = 550 - 11 = 441
300
Jeanne makes hair bows to sell at the craft fair. Each bow requires 1.5 yards of ribbon. At the fabric store, ribbon is sold by the foot. If Jeanne wants to make 84 bows, how many feet of ribbon must she buy? Show all your work.
378
300
How is the product for 25 x 30 different from the product for 2.5 x 30?
It is ten times less because of the placement of the decimal number. 25 x 30 = 750 2.5 x 30 = 75
400
Write and solve this expression: "the sum of 3 fifteens and 17 fifteens"
(3 x 15) + (7 x 15) = 45 + 105 = 150
400
Compare without calculating... 48 x 12 ________ 50 twelves - 3 twelves
48 x 12 ____>____ 50 twelves - 3 twelves
400
Solve using the standard algorithm... 514 x 33
16,962
400
Jeanne makes hair bows to sell at the craft fair. Each bow requires 1.5 yards of ribbon. If the ribbon costs 10¢ per foot, what is the total cost of the ribbon in dollars? Explain your reasoning, including how you decided where to place the decimal.
37.8
400
Write the expression and solve for the two sentences below... 1.) twelve plus three times five 2.) the sum of twelve and three times five
1.) 12 + 3 x 5 = 27 2.) (12+ 3) x 5 = 75
500
Write the word sentence and solve: 10 x (250 + 45)
"10 times the sum of 250 and 45" = 10 x 295 = 2,950
500
Compare without calculating... 24 x 36 _______ 18 twenty fours, doubled
24 x 36 ___=____ 18 twenty fours, doubled
500
Solve any way you like... 546 x 405
221,130
500
Jeanne makes hair bows to sell at the craft fair. Each bow requires 1.5 yards of ribbon. A manufacturer is making 1,000 times as many bows as Jeanne to sell in stores nationwide. Write an expression using exponents to show how many yards of ribbon the manufacturer will need. Do not calculate the total.
126 x 10 to the power of 3
500
Write the expression and solve: "the sum of the quotient of 99 and 11 and the product of 1.5 and 12 times the difference of the sum of 3 and 8 and 7" (:-s
[(99 ÷ 11) + (1.5 x 12)] x [(3 + 8) - 7)] (9 + 18) x (11 - 7) 27 x 4 108
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