0
8 = 4*2
So 5*8 = 5*(4*2) which, by the associative property, = (5*4)*2
= 20*2
Can you do 20*2 more easily than 5*8?
If not, you need another round of associate property.
20 = 10*2
So 20*2 = (10*2)*2 = 10*(2*2) = 10*4
And if you cannot do 10*4 then this question is beyond you anyway and knowing 5*4 is not going to help.
Still curious? Ask our experts.
Chat with our AI personalities
CoachSuccess isn't just about winning—it's about vision, patience, and playing the long game.
Chat with Coach
JordanLooking for a career mentor? I've seen my fair share of shake-ups.
Chat with Jordan
RossEvery question is just a happy little opportunity.
Chat with RossAdd your answer:
Earn +20 ptsQ: How does knowing that 5x4 equals 20 help you find 5x8?
Write your answer...
Submit
Still have questions?
Continue Learning about Math & Arithmetic
What times what equals twenty?
2X10 would work, as would 5X4.
Can you use the facts 5x4 and 1x4 to find 6x8?
no. 6x8 =48. 5x4 + 1x4 =20 + 4 =24.
What 5X4 represents?
20
How do you factorise 5x4 - 2x?
5x4 - 2x = x*(5x3 - 2) and that cannot be factorised further without invoking surds.
Which is more the sum of 4 and 5 or the product of 4 and 5?
the product of 5x4 because 5x4=20 and 5+4=9
Trending Questions
What is the mnumeric number of 10000?
What is 92.3 in scientific notation?
Is an octogon a quadrilateral?
Estimate 45 times 40 divided by 6.1?
What does it mean if you keep finding dimes in your house?
What is the GCF of 38 and 56?
What is discrete or continuous MEAN?
A team has the probability of winning one out of every six games What is the minimum number of games the team should play to have a fair chance of winning atleast one game?
How do you say 758 in French?
What is the percent of increase from 250 to 255?
Is fulfill a compound word?
Is 9000 cm greater than or less than 2km?
What is 7 percent of 72.90?
What are some characteristics of 'absolute value'?
What is the product of the first prime number less than 100?
What two regions is the fall line between?
What is the value of 6 in 231.684?
What number goes into 7 and 35?
Can a sty last more than 1 month?
5 6 x 12 25?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.