MATHEMATICS REVIEWER
FOR 3RD GRADE
NUMBERS AND OPERATION & ALGEBRA are common core content. Common core content means it touches K-12 students.
The State expected 3rd grade students to use their previous knowledge in subtraction to solve number sequence problem. Also to have pre-algebra exposure by learning how to analyze a problem situation, determine the question(s) to be answered, and determine how to represent the problem. For example learning to discover the mathematical rule in number sequence.
Pre-Algebra and Algebra is very important concept because Algebra equates or connect the physical things by discovering its pattern, relationship, association and finally create general rule, general equation or general theory without touching the physical things. Why is this important? Algebra is important because once the relationship or formula or equation was discovered it can be used to precisely do actual financial or physical transaction. Material waste and financial waste are eliminated by not doing trial and error.
SHORT CUT SOLUTION TO SAVE TIME
71 - N = 62 YOUR ASSUMED RULE. SOLVE FOR N VALUE. N =71-62 = 9
62- N = 53 ? IS THIS TRUE? TO FIND OUT, SUBSTITUE N = 9
62- 9 = 53 Yes, your assumed rule is working or valid
53 - 9 = 44
44 - 9 = 35
35 - 6 = 26
SO THE ANSWER IS : A