C002 Compensation Laws

Motivation: Burn the past
Explaining the Compensative Law
Work to memorise
[b][color=#ff0000]Compensative Law[/color][/b][br]If you round off a number by adding or subtracting a number and then compensate by adding or subtracting the opposite of that number without changing the result, the sum has compensative properties. [br][color=#0000ff][b]Example:[/b][/color]    367 + 154[br]  = 367 + 3 + 154 - 3[br](round the first number off to nearest 100 and compensate by subtracting 3 to the second number).[br]  =  370 + 151[br]  =  521[br][b][color=#0000ff]Example (careful with subtraction): [/color][/b]    356 – 247[br]          = 356 + 3 - 247 - 3[br](round the second number off to nearest 100 and compensate by adding 3 to the first number).[br]          = 359 - 250[br]          = 109  [br][b][color=#ff0000]Addition and subtraction are both compensative[/color][/b]
Do activity
B2B Algebra[br]A01 General introduction[br]C002 Compensation Laws
The compensative law apply to:
The idea is to round off numbers to numbers that are easier to work with
How can I deal with the following
546-129[br]I decide I would like to round the -129 off to -130[br]How do I do that?
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Information: C002 Compensation Laws