What is the first step in the shortcut method for squaring a two-digit number?

Shortcut Method for Squaring Two-Digit Numbers

Interactive Video
•
Mathematics
•
6th - 10th Grade
•
Hard

Olivia Brooks
FREE Resource
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Subtract ten from the number
Add the number to itself
Determine the distance to the nearest multiple of ten
Multiply the number by ten
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the example of squaring 23, what is the nearest multiple of ten used?
10
25
30
20
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of 20 times 26 plus 3 squared in the example provided?
529
520
530
540
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many units is 23 from the multiple of ten used in the alternative approach?
10
7
5
3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the expression obtained when using the alternative approach with 23 squared?
20 times 26 plus 3 squared
30 times 16 plus 7 squared
25 times 18 plus 5 squared
15 times 28 plus 8 squared
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the proof, what does the expression 10X plus Y represent?
A four-digit number
A single-digit number
A three-digit number
A two-digit number
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of multiplying 10X by 10X in the proof?
20X squared
100X squared
10X squared
50X squared
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