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multiplying 2 digit numbers Flashcards | StudBud
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multiplying 2 digit numbers
multiplying 2 digit numbers
25 terms
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StudBud Administration
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151 plays
using partial products, estimation, area models and regrouping
Flashcards
25 cards
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Questions
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Answers
1
In the problem 45 X 67, when you multiply both number in the tens place you get?
280
2400
240
350
2
Find two possible factors for the estimated products of 2800
40 x 70
40 X 60
50 X 40
70 x 4
3
Ali has 6 times as many pens as her brother Eli. Eli has 9 pens. How many pens does Ali have?
55 pens
60 pens
54 pens
53 pens
4
In halving and doubling if I wanted to multiply 14 X 20 its easiest to break it apart to....
14 x 10
7 x 10 and then double that answer
7 x 20 and then double that answer
7 x 10
5
Attendance at the hockey game was 103,567. What is the value of the digit 3?
300
30
30000
3000
6
In the problem 31 X 35 the numbers round to...
31 x 40
30 x 40
30 x 30
30 x 35
7
A hotel has 8 rooms. There are 3 people in each & Each person uses 2 pillows, how many needed?
24 pillows
48 pillows
46 pillows
6 pillows
8
Estimate using compatible numbers. 24 X 9
220
180
250
300
9
What is an estimate?
a close guess of actual answer
it tells you what you are trying to find in the problem.
it's the actual value
it's whatever you think it is
10
26 x $79 if using compatible numbers the problem may look like
26 x $80
30 x $80
25 x $80
30 X $100
11
Another word we can use for estimation may be....
rounding
distributive property
actual
take a guess
12
When you regroup, where do you record the number you regrouped?
at the bottom of the problem
in your head
at the top of the next place to the left
at the top of the next place to the right
13
if both estimated factors are less than the actual factors then
The product will be totally wrong
the estimated product will be more than the actual product
the estimated product will be less than the actual product
it doesn't matter the answer is the same
14
Estimate if a movie theater has 26 rows of 18 seats. About how many can watch the movie?
500 people
300 people
600 people
400 people
15
Find the estimated product of 26 X $59
$180
180
$150
$1800
16
What is another name for 38 ten thousands?
38,000
380
380,000
3,800
17
In the problem 15 X 23, when you multiply the ones digits you get.....
18
15
3
30
18
A concert reported 15675 fans attended the arena. What is this rounded to the nearest thousand
20000
15700
15000
16000
19
solve by mental math 30 X 300
900
9000
90
90000
20
You can use all the methods below except ____to solve multiplication problems.
expanded form
mental math
models
partial products
21
In mental math when multiplying 400 x 80 the product will have
two zeros in the answer
three zeros in the answer
five zeros in the answer
four zeros in the answer
22
Multiply 40 X 400
160000
1600
160
16000
23
The biggest error when doing partial products may be .....
all of the above
aligning up the numbers to add them up
multiplication
skipping a partial product when multiplying
24
What is a reasonable estimate for the product 25 X 52?
1000
1800
1500
150
25
Phil has 4 times as many ties as Mike. Altogether they have 20 ties. How many does Mike have?
5 ties
24 ties
4 ties
6 ties
