# section 2 (math)

Flashcards by Ella Ivanovici, updated more than 1 year ago
 Created by Ella Ivanovici over 5 years ago
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### Description

grade 7 Math Flashcards on section 2 (math), created by Ella Ivanovici on 12/04/2015.

## Resource summary

 Question Answer what is the divisibility rule for 2? it has to be even what is the divisibility rule for 3? it is the sum of the digits of the number and that # has to by divisible by 3 what is the divisibility rule for 4? last 2 digits divisible by 4 ex: 324: *24 are the last 2 digits what is the divisibility rule for 5? the last digit is either 0 or 5 what is the divisibility rule for 6? it has to be divisible by 2 and 3 what is the divisibility rule for 9? The sum of all digits is divisible by 9 what is the divisibility rule for 10? the last digit is 0 what is the divisibility rule for 12? it is divisible by 4 and 3 what is the divisibility rule for 25? the last two digits are divisible by 25 is 297 324 divisible by 5 no is 297 324 divisible by 2 yes explain relatively prime Two numbers are "relatively prime" when they have no common factors other than 1 is 297 324 divisible by 6 yes is 297 324 divisible by 3 yes is 297 324 divisible by 12 yes is 297 324 divisible by 9 yes do this operation using BEDMAS 2+ [5+3x(10-6➗2)] -4 the answer is 24￼￼￼￼ *(see notes for explanation)* explain how to calculate an average firs you add all the numbers then you divide the answer by the number or number you added ex: 2 + 2 + 4 + 2 = 8 8 ➗ 4 = 2 *that is the average* find the average of 35, 60, 85, 40 and 35 35 + 60 + 85 + 40 + 35 = 255 255 ➗ 5 = 51 explain how to calculate the rang/mean First you find the highest number and the lowest number and then subtract them ex: 1*, 2, 4*, 3, 4 - 1 = 3 *that is the range* explain the perimeter the perimeter is the distance around a two-dimensional shape explain the area Area is a measure of how much space there is on a flat surface

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