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Solution - Long addition

200000000.000016

200000000.000016

See steps

Step-by-step explanation

1. Rewrite the numbers from top to bottom, aligned by their place values

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
										.

Put zeros in the blank number places:

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
										.

2. Add up the digits in each column, from right to left

Add the numbers in the millionths place value.
0+6=6

Write 6 in the millionths place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
										.						6

Add the numbers in the hundred thousandths place value.
0+1=1

Write 1 in the hundred thousandths place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
										.					1	6

Add the numbers in the ten thousandths place value.
0+0=0

Write 0 in the ten thousandths place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
										.				0	1	6

Add the numbers in the thousandths place value.
0+0=0

Write 0 in the thousandths place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
										.			0	0	1	6

Add the numbers in the hundredths place value.
0+0=0

Write 0 in the hundredths place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
										.		0	0	0	1	6

Add the numbers in the tenths place value.
0+0=0

Write 0 in the tenths place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
										.	0	0	0	0	1	6

Add the numbers in the ones place value.
0+0=0

Write 0 in the ones place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
									0	.	0	0	0	0	1	6

Add the numbers in the tens place value.

Write 0 in the tens place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
								0	0	.	0	0	0	0	1	6

Add the numbers in the hundreds place value.

Write 0 in the hundreds place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
							0	0	0	.	0	0	0	0	1	6

Add the numbers in the thousands place value.

Write 0 in the thousands place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
						0	0	0	0	.	0	0	0	0	1	6

Add the numbers in the ten thousands place value.

Write 0 in the ten thousands place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
					0	0	0	0	0	.	0	0	0	0	1	6

Add the numbers in the hundred thousands place value.

Write 0 in the hundred thousands place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
				0	0	0	0	0	0	.	0	0	0	0	1	6

Add the numbers in the millions place value.

Write 0 in the millions place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
			0	0	0	0	0	0	0	.	0	0	0	0	1	6

Add the numbers in the ten millions place value.

Write 0 in the ten millions place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
		0	0	0	0	0	0	0	0	.	0	0	0	0	1	6

Add the numbers in the hundred millions place value.

Write 2 in the hundred millions place.

Place value	hundred millions	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
TABLE_NAME_CARRY
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	0	0
+									0	.	0	0	0	0	1	6
	2	0	0	0	0	0	0	0	0	.	0	0	0	0	1	6

The solution is: 200000000.000016

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Why learn this

Addition is the most basic math action and is used daily by almost everybody. Playing games, paying at the supermarket, and cooking are just a few examples of when we add.
Long addition is a clear and simple method to add numbers. Especially big numbers.
Although today calculators do this job for us, understanding the concept of addition is a key ability for understanding math.

Terms and topics

Long addition