3J Bearington's Mistakes

Bearington used the inverse operation of division and changed it to multiplication when he used the reciprical method.

Bearington flipped the first fraction and multiplied straight across.

Bearington skipped the second fraction before he multiplied straight across.

Bearington did not make a mistake.

Bearington multiplied straight across to get

Bearington multiplied the numerator of the first fraction with the denominator of the second fraction. He multiplied the denominator of the first fraction with the numerator of the second fraction.

Bearington should have simplified to get

Bearington should have multiplied straight across.

Bearington did not make any mistake.

Bearington is mixing up prime numbers with factors.

Bearington meant to say that the GCF of two prime numbers is always 1.

Bearington forgot that multiples go up and factors go down.

Bearington thought that you find LCM by listing the multiples of each number.

Bearington used 3 as the GCF. Since 3x20 =60 and 3x30=90, we should take 3 and multiply it by the sum of 20 + 30.

Bearington should have used 30 as the GCF. If he had, he would have multiplied 30(2 +3)

Bearington should have used 10 as the GCF. If he had, he would have multiplied 10(6+9)

Bearington did not make a mistake.