GED Math : GED Math

Study concepts, example questions & explanations for GED Math

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Example Questions

Example Question #5 : Multiplication

Multiply the following numbers:  \(\displaystyle 54\times 78\)

Possible Answers:

\(\displaystyle 4212\)

\(\displaystyle 4312\)

\(\displaystyle 3212\)

\(\displaystyle 3112\)

\(\displaystyle 4112\)

Correct answer:

\(\displaystyle 4212\)

Explanation:

Multiply the first number with the ones digit of the second number.

\(\displaystyle 54\times 8 = 432\)

Repeat the process with the tens digit of the second number.

\(\displaystyle 54\times 7 = 378\)

Add a zero to the end of this number and add this with the first number.

\(\displaystyle 3780+432 = 4212\)

The answer is:  \(\displaystyle 4212\)

Example Question #231 : Ged Math

Multiply the following numbers:  \(\displaystyle 314\times 15\)

Possible Answers:

\(\displaystyle 4610\)

\(\displaystyle 4620\)

\(\displaystyle 4810\)

\(\displaystyle \textup{The answer is not given.}\)

\(\displaystyle 4710\)

Correct answer:

\(\displaystyle 4710\)

Explanation:

Multiply the first number with the ones digit of 15.

\(\displaystyle 314\times 5 = 1570\)

Multiply the first number with the tens digit of 15.

\(\displaystyle 314\times 1 = 314\)

Add a zero to the end of this number and add this with the first number solved.

\(\displaystyle 3140+1570 = 4710\)

The answer is:  \(\displaystyle 4710\)

Example Question #232 : Ged Math

Multiply the following:

\(\displaystyle \frac{1}{6} \cdot \frac{1}{2}\)

Possible Answers:

\(\displaystyle \frac{1}{3}\)

\(\displaystyle \frac{1}{4}\)

\(\displaystyle \frac{1}{12}\)

\(\displaystyle \frac{2}{12}\)

\(\displaystyle 3\)

Correct answer:

\(\displaystyle \frac{1}{12}\)

Explanation:

To multiply fractions, we will multiply the numerators together, then we will multiply the denominators together.

So, we get

\(\displaystyle \frac{1}{6} \cdot \frac{1}{2}\)

 

\(\displaystyle \frac{1 \cdot 1}{6 \cdot 2}\)

 

\(\displaystyle \frac{1}{12}\)

Example Question #231 : Numbers And Operations

Multiply the numbers:  \(\displaystyle 72\times 76\)

Possible Answers:

\(\displaystyle 5472\)

\(\displaystyle 5482\)

\(\displaystyle 5842\)

\(\displaystyle \textup{The answer is not given.}\)

\(\displaystyle 5372\)

Correct answer:

\(\displaystyle 5472\)

Explanation:

Multiply the first number with the ones digit of the second number.

\(\displaystyle 72\times 6 = 432\)

Multiply the first number with the tens digit of the second number.

\(\displaystyle 72\times 7 = 504\)

Add a zero to the end of this number and add this with the first number calculated.

\(\displaystyle 5040+432 = 5472\)

The answer is:  \(\displaystyle 5472\)

Example Question #61 : Basic Operations

Multiply the following numbers:  \(\displaystyle 32\times 87\)

Possible Answers:

\(\displaystyle 2774\)

\(\displaystyle 2784\)

\(\displaystyle 2674\)

\(\displaystyle 2887\)

\(\displaystyle 2704\)

Correct answer:

\(\displaystyle 2784\)

Explanation:

Multiply the first number with the ones digit of the second number.

\(\displaystyle 32\times 7 = 224\)

Repeat the process with the tens digit.

\(\displaystyle 32\times 8= 256\)

Add a zero to the end of this number and add it with the first number solved.

\(\displaystyle 2560+224=2784\)

The answer is:  \(\displaystyle 2784\)

Example Question #71 : Basic Operations

Multiply the numbers:  \(\displaystyle 61\times 24\)

Possible Answers:

\(\displaystyle 1564\)

\(\displaystyle 1464\)

\(\displaystyle 1446\)

\(\displaystyle 1644\)

\(\displaystyle 1554\)

Correct answer:

\(\displaystyle 1464\)

Explanation:

Multiply the first number with the ones digit of the second number.

\(\displaystyle 61\times 4 = 244\)

Repeat using the tens digit of the second number.

\(\displaystyle 61\times 2 = 122\)

Add a zero to the end of this number and add this with the first number.

\(\displaystyle 1220+244 = 1464\)

The answer is:  \(\displaystyle 1464\)

Example Question #231 : Ged Math

Multiply the following numbers:  \(\displaystyle 15\times 23\)

Possible Answers:

\(\displaystyle 235\)

\(\displaystyle 750\)

\(\displaystyle 335\)

\(\displaystyle 345\)

\(\displaystyle 175\)

Correct answer:

\(\displaystyle 345\)

Explanation:

Multiply the first number with the ones digit of the second number.

\(\displaystyle 15\times 3 = 45\)

Repeat the process with the tens digit.

\(\displaystyle 15\times 2 = 30\)

Add an extra zero to the end of this number and add the number with the first number calculated.

\(\displaystyle 300+45 = 345\)

The answer is:  \(\displaystyle 345\)

Example Question #11 : Multiplication

Multiply the numbers:  \(\displaystyle 98\times 45\)

Possible Answers:

\(\displaystyle 4210\)

\(\displaystyle 4420\)

\(\displaystyle 4320\)

\(\displaystyle 4410\)

\(\displaystyle 4310\)

Correct answer:

\(\displaystyle 4410\)

Explanation:

Multiply the first number with the ones digit of the second number.

\(\displaystyle 98\times 5 = 490\)

Multiply the first number with the tens digit of the second number.

\(\displaystyle 98\times 4 = 392\)

Add a zero to the end of this number and add this value to the first number.

\(\displaystyle 3920+490 = 4410\)

The answer is:  \(\displaystyle 4410\)

Example Question #12 : Multiplication

Multiply the numbers:  \(\displaystyle 78\times 54\)

Possible Answers:

\(\displaystyle 4312\)

\(\displaystyle 3312\)

\(\displaystyle 4332\)

\(\displaystyle 3412\)

\(\displaystyle 4212\)

Correct answer:

\(\displaystyle 4212\)

Explanation:

Multiply the first number with the ones digit of the second number.

\(\displaystyle 78\times 4 = 312\)

Multiply the first number with the tens digit of the second number.

\(\displaystyle 78\times 5 = 390\)

Add a zero to the end of this number and add the value with the first number.

\(\displaystyle 3900+312 = 4212\)

The answer is:  \(\displaystyle 4212\)

Example Question #231 : Numbers And Operations

Multiply the numbers:  \(\displaystyle 516\times18\)

Possible Answers:

\(\displaystyle 8280\)

\(\displaystyle 9288\)

\(\displaystyle 8188\)

\(\displaystyle 9188\)

\(\displaystyle 8128\)

Correct answer:

\(\displaystyle 9288\)

Explanation:

Multiply the first number with the ones digit of the second number.

\(\displaystyle 516\times 8 = 4128\)

Multiply the first number with the tens digit of the second number.

\(\displaystyle 516\times 1 = 516\)

Add a zero to the end of this number and all the first number.

\(\displaystyle 5160+4128 = 9288\)

The answer is:  \(\displaystyle 9288\)

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