00:01
Let me help you to answer the 4, the 8 calculation in the learning task 1.
00:11
Find the sum or difference.
00:14
Express the answer in lowest term.
00:19
The first one is 4 eighth minus 2 eighth.
00:30
The denominator is the same, so i do the subtraction on the numerator.
00:36
4 minus 2 is 2.
00:37
So 2a is, i can cancel out to the common factor, which is 2.
00:41
Simplified to one -fourth.
00:47
Second subtraction is 10 -24th minus 5 -12th.
00:59
I can multiply 2, common factor 2 to the second fraction.
01:06
So it's 10 -24th minus 10 -24.
01:15
The difference is 0.
01:21
And then the third addition is 10 -28th plus 12 -28th.
01:38
10 plus 12 is 20, 20 over 28.
01:43
Okay, i can cancel the common factor, which is 4, so i left with 5 over 7.
01:49
So it's 5 7s.
01:55
For the 4th, subtraction, 40 over 56 minus 10 over 28th, i can cancel.
02:12
For the second fraction, i can multiply both numeric and denominator by 2.
02:22
So this will be 40 over 56 minus 20 over 56.
02:31
So to simplify the 220 over 56.
02:35
I can cancel the common factor, which is, i think it's 4.
02:41
So 5 over 14th...