-21x5 a 3 - 14 x4 a 4 ÷ 7 x3a 2
Answers
Step-by-step explanation:
ALGEBRAIC EXPRESSIONS
Number and Algebra : Module 23Year : 7
June 2011
PDF Version of module
Assumed Knowledge
Motivation
Content
Using pronumerals
Notations and laws
Substitution
Adding and subtracting like terms
The Use of brackets
Multiplying terms
Arrays and areas
Arrays
Number patterns
Algebraic fractions
Expanding brackets and collecting like terms
links Forward
History
References
Answers to Exercises
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ASSUMED KNOWLEDGE
Fluency with addition, subtraction, multiplication and division of whole numbers
and fractions.
Ability to apply the any-order principle for multiplication and addition (commutative law and associative law) for whole numbers and fractions.
Familiarity with the order of operation conventions for whole numbers.
Answer:
28_..49_21is the answer