Question

Justify each step.
3•(10•12)=3•(12•10)
=(3•12)•10
=36•10
=360

Answer 1

3•(10•12)=3•(12•10) = 360 = True

Explanation:

left-hand side Simplify the following:

3×10×12

10×12 = 120:

3×120

3×120 = 360:

Answer: 360

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Right-hand side:

Simplify the following:

3×12×10

Hint: | Multiply 12 and 10 together.

12×10 = 120:

3×120

Hint: | Multiply 3 and 120 together.

3×120 = 360:

Answer: 360