### About Subtraction:

We can easily subtract single digit whole numbers without the use of a pencil and paper. When we start subtracting multi-digit whole numbers, it becomes more difficult to perform the operation in one’s head. Generally, we subtract multi-digit whole numbers using a process known as vertical subtraction.

Test Objectives

- Demonstrate the ability to set up a vertical subtraction
- Demonstrate the ability to perform a vertical subtraction
- Demonstrate the ability to use the borrowing procedure

#1:

Instructions: Subtract each.

a) 71 - 55

b) 312 - 18

c) 1090 - 1002

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#2:

Instructions: Subtract each.

a) 572 - 101

b) 3001 - 865

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#3:

Instructions: Subtract each.

a) 15,984 - 14,297

b) 13,215 - 9087

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#4:

Instructions: Subtract each.

a) 313,975 - 303,989

b) 4,277,680 - 305,000

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#5:

Instructions: Subtract each.

a) 80,773,916 - 42,874

b) 919,121,426 - 141,914,627

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Written Solutions:

#1:

Solutions:

a) 16

b) 294

c) 88

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#2:

Solutions:

a) 471

b) 2136

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#3:

Solutions:

a) 1687

b) 4128

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#4:

Solutions:

a) 9986

b) 3,972,680

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#5:

Solutions:

a) 80,731,042

b) 777,206,799