As a child, in school you never think of math rules ever expiring. This make you question the fact why teacher still teach these rules if they are going to expire when we enter middle school. This make you ask yourself does math rules expire. Does the rules we learn in elementary school matter?
When you multiply a number by ten, just add a zero to the end of the number. As a child, we learn when multiplying a number by ten just add a zero; this made learning the ten time tables easy for some. However, this is not true when multiplying decimals by ten. As a teacher, teaching this rule to her students she should advise student ahead of time that this rule only work with whole number and provide examples of how this rule couldn’t work. As a student, in college I still use this rule in my math classes, but I know when to use. The rule is set to expire in the fifth grade.
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This rule made learning how to divide easy to all of us. However, this rule only work when students are learning their basic facts for whole-number division problems. As a student, I never did follow this rule. Teachers should provide examples of when and when not to use this rule when teaching students division. In my opinion, this wouldn’t be a rule that I would teach to my students, because when you get to fractions this might make teaching how to divide fractions harder to understand to some students. This rule is set to expire in the fifth grade.
Two negatives make a positive. However, this rule only works when multiplication and division integers. When teaching this rule, teachers should make it clear to students that you can’t use this rule when addition and subtraction. The teacher should provide examples of when to use the rule. This rule in my opinion, can never expire, because this rule if you think about only applies to multiplying and dividing integers. This rule is set to expire in the seventh