GED Math : Addition and Subtraction

Study concepts, example questions & explanations for GED Math

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Example Questions

Example Question #191 : Ged Math

Add the following numbers:  \(\displaystyle 11+84+35+87\)

Possible Answers:

\(\displaystyle 187\)

\(\displaystyle 197\)

\(\displaystyle 237\)

\(\displaystyle 207\)

\(\displaystyle 217\)

Correct answer:

\(\displaystyle 217\)

Explanation:

Add the one digits.

\(\displaystyle 1+4+5+7 = 17\)

Add the the tens digits with the one as the carryover.

\(\displaystyle 1+8+3+8+(1) = 21\)

Combine this number with the ones digit of the first number.

The answer is:  \(\displaystyle 217\)

Example Question #31 : Basic Operations

Add the following numbers:  \(\displaystyle 487+841+352+116\)

Possible Answers:

\(\displaystyle 1996\)

\(\displaystyle 1686\)

\(\displaystyle 1896\)

\(\displaystyle 1796\)

\(\displaystyle 1696\)

Correct answer:

\(\displaystyle 1796\)

Explanation:

Add the ones digits.

\(\displaystyle 7+1+2+6 = 16\)

Add the tens digits with the one as the carryover.

\(\displaystyle 8+4+5+1+(1) = 19\)

Add the hundreds digits with the one as the carryover.

\(\displaystyle 4+8+3+1+(1) = 17\)

Combine this number with the ones digits of the previous numbers.

The answer is:  \(\displaystyle 1796\)

Example Question #191 : Ged Math

Add the following numbers:  \(\displaystyle 54+96+77\)

Possible Answers:

\(\displaystyle 207\)

\(\displaystyle 197\)

\(\displaystyle 207\)

\(\displaystyle 227\)

\(\displaystyle 217\)

Correct answer:

\(\displaystyle 227\)

Explanation:

Add the ones digits.

\(\displaystyle 4+6+7 = 17\)

Add the tens digits with the tens digit as the carryover.

\(\displaystyle 5+9+7+(1) = 22\)

Combine this number with the ones digit of the first number calculated.

The answer is:  \(\displaystyle 227\)

Example Question #31 : Basic Operations

Add the following numbers:  \(\displaystyle 647+677+116\)

Possible Answers:

\(\displaystyle 1450\)

\(\displaystyle 1330\)

\(\displaystyle 1320\)

\(\displaystyle 1440\)

\(\displaystyle 1540\)

Correct answer:

\(\displaystyle 1440\)

Explanation:

Add the ones digits.

\(\displaystyle 7+7+6 = 20\)

Carryover the two, and add the tens digits.

\(\displaystyle 4+7+1+(2) = 14\)

Carryover the one, and add the hundreds digits.

\(\displaystyle 6+6+1+(1) = 14\)

Combine this number with the ones digits of the other numbers.

The answer is:  \(\displaystyle 1440\)

Example Question #32 : Basic Operations

Add the numbers:  \(\displaystyle 47+13+88\)

Possible Answers:

\(\displaystyle 147\)

\(\displaystyle 148\)

\(\displaystyle 157\)

\(\displaystyle 138\)

\(\displaystyle 158\)

Correct answer:

\(\displaystyle 148\)

Explanation:

Add the ones digits.

\(\displaystyle 7+3+8 = 18\)

Add the tens digits with the one as the carryover.

\(\displaystyle 4+1+8+(1) = 14\)

Combine this number with the ones digit of the first number.

The answer is:  \(\displaystyle 148\)

Example Question #31 : Addition And Subtraction

Add the following numbers:  \(\displaystyle 43+64+88\)

Possible Answers:

\(\displaystyle 205\)

\(\displaystyle 215\)

\(\displaystyle 195\)

\(\displaystyle 175\)

\(\displaystyle 185\)

Correct answer:

\(\displaystyle 195\)

Explanation:

Add the ones digits.

\(\displaystyle 3+4+8 = 15\)

Carryover the one, and add the tens digits.

\(\displaystyle 4+6+8+(1) = 19\)

Combine this value with the ones digit of the first step.

The answer is:  \(\displaystyle 195\)

Example Question #201 : Numbers And Operations

Add the following numbers:  \(\displaystyle 79+45+43\)

Possible Answers:

\(\displaystyle 156\)

\(\displaystyle 177\)

\(\displaystyle 157\)

\(\displaystyle 167\)

\(\displaystyle 147\)

Correct answer:

\(\displaystyle 167\)

Explanation:

Add the one digits.

\(\displaystyle 9+5+3 =17\)

Carry the one, and then add all the tens digits.

\(\displaystyle 7+4+4+(1) = 16\)

Combine this number with the ones digit of the first number.

The answer is:  \(\displaystyle 167\)

Example Question #201 : Numbers And Operations

Add the numbers:  \(\displaystyle 16+79+14+89+52\)

Possible Answers:

\(\displaystyle 150\)

\(\displaystyle 240\)

\(\displaystyle 220\)

\(\displaystyle 250\)

\(\displaystyle 260\)

Correct answer:

\(\displaystyle 250\)

Explanation:

Add the ones digits.

\(\displaystyle 6+9+4+9+2 =30\)

Carryover the three and add all the tens digits.

\(\displaystyle 1+7+1+8+5 +(3) = 25\)

Combine this number with the ones digit of the first number.

The answer is:   \(\displaystyle 250\)

Example Question #31 : Basic Operations

Add the numbers:  \(\displaystyle 345+487+164\)

Possible Answers:

\(\displaystyle 886\)

\(\displaystyle 986\)

\(\displaystyle 776\)

\(\displaystyle 996\)

\(\displaystyle 896\)

Correct answer:

\(\displaystyle 996\)

Explanation:

Add the ones digits.

\(\displaystyle 5+7+4 = 16\)

Carryover the one and add the tens digits.

\(\displaystyle 4+8+6+(1) = 19\)

Carryover the one and add the hundreds digits.

\(\displaystyle 3+4+1+(1) = 9\)

Combine all the ones digits.

The answer is:  \(\displaystyle 996\)

Example Question #202 : Ged Math

Add the numbers:  \(\displaystyle 94+79+86\)

Possible Answers:

\(\displaystyle 249\)

\(\displaystyle 359\)

\(\displaystyle 269\)

\(\displaystyle 239\)

\(\displaystyle 259\)

Correct answer:

\(\displaystyle 259\)

Explanation:

Add the one digits.

\(\displaystyle 4+9+6 = 19\)

Add the tens digits with the carryover of one.

\(\displaystyle 9+7+8+(1) =25\)

Combine this value with the ones digit of the first number.

The answer is:  \(\displaystyle 259\)

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