Harold says, to find 6 x 8, I can use the facts for 5 x 4 and 1 x4. Do you agree? Explain
I disagree.
What do you think?
me to i disagree bec. 5 x 4 = 20 ; 1 x 4 = 4, so 20 + 4 = 24... 6 x 8 = 48
To find 6 x 8, Harold suggests using the facts for 5 x 4 and 1 x 4. Let's break it down and see if we agree with Harold's approach.
First, let's take a look at 5 x 4. This multiplication fact states that if you have 5 groups of 4, you would have a total of 20. This fact is derived by calculating 5 times 4 using the traditional multiplication method.
Next, we have 1 x 4. This fact tells us that if you have 1 group of 4, you would have a total of 4.
Now, if we consider Harold's approach, he suggests using these two multiplication facts to find the answer for 6 x 8. As per his suggestion, we can break down 6 x 8 into (5 x 4) + (1 x 4).
This is because we can split the number 6 into 5 and 1, mirroring what Harold suggests. By doing so, we can focus on multiplying each smaller number (5 and 1) by 4 separately, and then add the results together.
Let's see this in action:
5 x 4 = 20 (as we established earlier)
1 x 4 = 4 (as we established earlier)
Now, if we add these two results together, we get:
20 + 4 = 24
Therefore, according to Harold's method, the answer for 6 x 8 is 24, which seems correct.
In conclusion, using the facts for 5 x 4 and 1 x 4 can indeed help us find the answer for 6 x 8 by breaking down the larger multiplication into smaller, more manageable parts.