Transcript Estimation & Mental Math

From Foot Of
Ten Elementary
Jeopardy!
School…
Estimation &
Mental Math
Multiples of 10,
100, & 1,000
Multiplying
Problem
Solving
$100
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$200
$200
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$300
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$400
$400
$400
$400
$500
$500
$500
$500
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Estimation & Mental Math - 100
Estimate the product of:
4 x 74
4 x 70 = 280
Estimation & Mental Math -200
Estimate the product of:
119 x 6
100 x 6 = 600
Estimation & Mental Math - 300
Solve mentally.
Show your work.
68 x 8
60 x 8 = 480
8 x 8 = 64
480 + 64 = 544
Estimation & Mental Math - 400
Estimate the product of:
341 x 4
300 x 4 = 1,200
Estimation & Mental Math - 500
Explain how
breaking apart could
be used to find the
product of 53 x 9.
Multiply 50 x 9 to get 450.
Multiply 3 x 9 to get 27.
Add 450 + 27 to get 477
Multiples of 10 100 & 1000 - 100
Find the product.
4 x 500
What is 2,000?
Multiples of 10 100 & 1000 - 200
Solve. 800 x 40
What is 32,000?
Multiples of 10 100 & 1000 - 300
Solve. 1200 x 60
What is 72,000?
Multiples of 10 100 & 1000 - 400
Solve. 2,500 x 400
What is 1,000,000?
Multiples of 10 100 & 1000 - 500
Solve. 5,700,000 x 40,000
What is 228,000,000,000?
Multiplication - 100
What is the product of:
8 x 34
What is 272?
Multiplication - 200
What is the product of:
476 x 8?
476 x 8 = 3,808
Multiplication - 300
Solve.
x
96
34
What is 32,776?
Multiplication - 400
Solve.
806
x 74
What is 59,644?
Multiplication - 500
Solve.
47,506
x 27
What is 1,282,662?
Problem Solving - 100
If a tube of golf
balls costs $3.57,
how much would 7
tubes cost?
$3.57 x 7 = $24.99
Problem Solving - 200
Kate and Ryan are designing
uniforms for their soccer team.
They want to use two different
colors for the shirt. Their
choices are green, orange, yellow,
and blue. How many ways can
they choose two colors?
What is 6 ways?
Problem Solving - 300
Kevin has a gerbil, a rabbit, a
ferret, and a turtle. He feeds them
in a different order each day. How
many different ways can he feed his
pets?
What is Kevin can feed his
pets in 24 different ways.
Problem Solving - 400
The school bought 7 cases of
pencils. Each case contains 12
boxes, and each box contains
100 pencils. How many pencils
did the school buy in all?
7 x 12 = 84
84 x 100 = 8,400 pencils
Problem Solving - 500
Julie has two times as many
baseballs as she has footballs.
She has a total of 18 footballs
and baseballs. How many
baseballs does Julie have?
Fx2=B
F + B = 18
6 x 2 = 12
6 + 12 = 18
Julie has 12 baseballs.
FINAL JEOPARDY
Freddy has 5 times as many
colored pencils as paintbrushes.
He has a total of 84 colored
pencils and paintbrushes. How
many of each does Freddy have?
PB x 5 = CP
PB + CP = 84
14 x 5 = 70
Freddy has 14 paintbrushes
14 + 70 = 84
and 70 colored pencils.