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- Use Properties Of Numbers And The Commutative And Associative Laws To Simplify Calculations | Exit Quiz | Oak National A
Use properties of numbers and the commutative and associative laws to simplify calculations | Exit Quiz | Oak National A
Authored by Oak National Academy
Mathematics
4th Grade
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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which factors would be best to associate together to calculate efficiently? 4 × 5 × 7 = ___
4 and 5
5 and 7
7 and 4
Answer explanation
Associating 4 and 5 together would produce 20, which can then be multiplied with 7 and would be equal to 140
2.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Tick the three factor equations that would be equal to this two factor equation. 15 × 20 = ___ × ___ × ___
15 × 4 × 5
15 × 3 × 5
3 × 5 × 20
15 × 2 × 10
Answer explanation
Breaking down two factor equations into 3 factor equations can often make our calculations easier.
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Tick the numbers that could be multiplied by a one digit number and would be equal to a multiple of 10.
8
9
12
15
Answer explanation
Knowing which numbers are equal to a multiple of 10 when multiplied by a single digit can be useful when looking to make calculations more simple.
4.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Find the product of this equation.
(a)
Answer explanation
You have managed to use your factors of 100 to help you find the product.
5.
MATCH QUESTION
1 min • 1 pt
Match the 4 factor equations that are equal to the two factor equations.
2 × 6 × 3 × 7
16 × 15
4 × 4 × 3 × 5
33 × 20
4 × 11 × 3 × 5
21 × 12
3 × 6 × 4 × 6
18 × 24
Answer explanation
You have shown you can identify the factors of two, two digit numbers as a 4 factor equation.
6.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Find the product of this equation. 32 × 15 = (a)
Answer explanation
You have managed to use your knowledge of factors to solve this equation. Could you have solved it another way?
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