Addition

Addition equations with 3 digit numbers

An equation is a mathematical statement that has an expression on the left side of the equals sign (=) with the same value as the expression on the right side. An example of an equation is 222 + 222 = 444.

One of the terms in an equation may not be known and needs to be determined. The unknown term may be represented by a letter such as x (e.g. 222 + x = 444). The equation is solved by finding the value of the unknown x that makes the two sides of the equation have the same value.

Use the subtractive equation property to find the value of x in addition equations. The subtractive equation property states that the two sides of an equation remain equal if the same number is subtracted from each side.

Example:
500 + x = 1200
500 + x - 500 = 1200 - 500
0 + x = 700
x = 700
Check the answer by substituting (700) for x in the original equation. The answer is correct if the expressions on each side of the equals sign have the same value.
500 + 700 = 1200

Subtracting six Digit Numbers

Subtracting two six digit numbers (for example 694,529 - 476,733) is illustrated


834
694529
476733
217796


Addition equations with 4 digit numbers

An equation is a mathematical statement that has an expression on the left side of the equals sign (=) with the same value as the expression on the right side. An example of an equation is 2222 + 2222 = 4444.

One of the terms in an equation may not be known and needs to be determined. The unknown term may be represented by a letter such as x (e.g. 2222 + x = 4444). The equation is solved by finding the value of the unknown x that makes the two sides of the equation have the same value.

Use the subtractive equation property to find the value of x in addition equations. The subtractive equation property states that the two sides of an equation remain equal if the same number is subtracted from each side.

Example:
5000 + x = 12000
5000 + x - 5000 = 12000 - 5000
0 + x = 7000
x = 7000
Check the answer by substituting (7000) for x in the original equation. The answer is correct if the expressions on each side of the equals sign have the same value.
5000 + 7000 = 12000


Adding Five Digit Numbers

Adding two five digit numbers (for example 94,529 + 76,733) is illustrated


111 1
94529
76733
171262


Addition equations with 5 digit numbers

An equation is a mathematical statement that has an expression on the left side of the equals sign (=) with the same value as the expression on the right side. An example of an equation is 22222 + 22222 = 44444.

One of the terms in an equation may not be known and needs to be determined. The unknown term may be represented by a letter such as x (e.g. 22222 + x = 44444). The equation is solved by finding the value of the unknown x that makes the two sides of the equation have the same value.

Use the subtractive equation property to find the value of x in addition equations. The subtractive equation property states that the two sides of an equation remain equal if the same number is subtracted from each side.

Example:
50000 + x = 120000
50000 + x - 50000 = 120000 - 50000
0 + x = 70000
x = 70000
Check the answer by substituting (70000) for x in the original equation. The answer is correct if the expressions on each side of the equals sign have the same value.
50000 + 70000 = 120000

Adding Six Digit Numbers

Adding two six digit numbers (for example 694,529 + 476,733) is illustrated


1111 1
694529
476733
1171262

Addition equations with 6 digit numbers

An equation is a mathematical statement that has an expression on the left side of the equals sign (=) with the same value as the expression on the right side. An example of an equation is 222222 + 222222 = 444444.

One of the terms in an equation may not be known and needs to be determined. The unknown term may be represented by a letter such as x (e.g. 222222 + x = 444444). The equation is solved by finding the value of the unknown x that makes the two sides of the equation have the same value.

Use the subtractive equation property to find the value of x in addition equations. The subtractive equation property states that the two sides of an equation remain equal if the same number is subtracted from each side.

Example:
500000 + x = 1200000
500000 + x - 500000 = 1200000 - 500000
0 + x = 700000
x = 700000
Check the answer by substituting (700000) for x in the original equation. The answer is correct if the expressions on each side of the equals sign have the same value.
500000 + 700000 = 1200000

Adding Seven Digit Numbers
Adding two seven digit numbers (for example 8,694,529 + 3,476,733) is illustrated


11111 1
8694529
3476733
12171262