Xiao’s teacher asked him to rewrite the sum 60+90 as a product of gcf of two numbers and a sum . xiao wrote 3(20+30.what mistake did xiao make ? how should he have written the sum

The first thing we must do for this case is find the factors of each of the numbers.

We have then:

60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

90: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

Therefore the GCF is given by:

So, by rewriting the sum we have:

The error is not having written the GCF multiplying.

Xiao did not write the sum as the product of GCF and the sum of two numbers.

The correct expression is:

a) 0.25x times 3. (could be wrong on equation.)

b) 2.25 pound of dark chocolate. (can i eat all the chocolate? plz? anyway, again, could be wrong, but i hope im right. all the chocolate together should be 5.25 pounds)

have a good day!

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632