Mental Math
What are the missing factors to make this estimation correct?
582 x 23 ≈ __________ x __________ = 12,000
600 x 20
546 x 33
18,018
If the area of a rectangle is 56.96 square meters and the length is 16 m, what is its perimeter?
Must have a tape diagram + work.
39.12 meters
What is the sum of 4 thirteens and 21 thirteens?
325
What is the name of the answer in multiplication?
Product
77 days is how many weeks?
11
215 -: 95
Solve, with a remainder, check your work with multiplication.
2 r 25
95 x 2 + 25
Valerie uses 12 fluid oz. of detergent each week for her laundry. If there are 75 fluid oz. of detergent in the bottle, in how many weeks will she need to buy a new bottle of detergent? Explain how you know
Must have a tape diagram and work shown.
6.25 weeks a bottle will last, so Valerie will need to buy a new bottle after 6 weeks.
Rewrite the following expression using words
(210+135) -:5
The sum of 210 and 135 divided by 5
or
Divide the total of 210 and 135 by 5
What is the name of the answer in division?
Quotient
Compare
8 × 8 4 eights, doubled
equal =
59 x 0.51
30.09
DOUBLE JEOPARDY!!!!!!!
There are 40 students going on a field trip. Each one pays their teacher $9.50 to cover admission to the museum and lunch. Admission for the students is $120 and each one gets an equal amount to spend on lunch. How much will each GT student be able to spend on lunch? Show your work and explain your thinking.
Each student can spend $6.50 on lunch.
What is the expression for: 18 thirty-sixes doubled?
(18x 36) x 2
or
2 x (18 x 36)
I can find the the dividend by multiplying the quotient and the divisor
true
DOUBLE JEOPARDY!!!!!!!!!
If 72.9 ÷ 9 = 8.1, then the quotient of 7.29 ÷ 90 is _________________. Use place value reasoning to explain the placement of the decimal point.
0.081
166.25 -:19
8.75
A city block is 3 times as long as it is wide. If the distance around the block is 0.48 kilometers, what is the area of the block in square meters?
Must have a tape diagram + work.
10,800 square meters.
Which is not equivalent to: 34 x 89
a- 34 x (80+9)
b- (34 x 8) + (34 x 9)
c- 34 x (90-1)
d- 89 thirty-fours
b
True or false:
I can check my multiplication by dividing the product by a factor in the equation.
true