Calculate the Product: Solving 30 × 39 Step by Step

30×39= 30\times39=

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Step-by-step video solution

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00:00 Solve
00:03 Let's use the distributive law
00:06 Let's break down 39 into 40 minus 1
00:12 Let's multiply each factor separately and subtract
00:26 Let's solve each multiplication and then subtract
00:35 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

30×39= 30\times39=

2

Step-by-step solution

To solving easier, we break down 39 into more convenient numbers, preferably round ones.

We obtain:

30×(40−1)= 30\times(40-1)=

We multiply 30 by each of the terms in parentheses:

(30×40)−(30×1)= (30\times40)-(30\times1)=

We solve the exercises in parentheses and obtain:

1,200−30=1,170 1,200-30=1,170

3

Final Answer

1170

Practice Quiz

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\( 140-70= \)

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