Monday, May 6, 2013

Help on 7th Grade Math

Introduction :

Mathematics is not something that we normally associate with sublime. The way mathematics is taught, it is a subject that many if not most people would prefer to avoid. The ability to state mathematical relationships as formulas greatly improves the ability to introduce abstractions. 7th grade math includes simple arithmetic operations, basic algebra and geometry. Let us see about help on 7th grade math. (Source: Wikipedia)


Example problems for help on 7th grade math:


Example 1: `2/8` of the birthday cake was eaten on john’s birthday day. The next day his sister ate `1/4 ` of what was left. John has to finish the cake, find the remaining cake.

Solution:

Given 2/8 is eaten by john and his sister ate `1/4`

The total amount of cake consider as 1.

` 2/8 + 1/4 = 4/8 = 1/2`

`1 - 1/2 = 1/2`

Therefore, the remaining cake is `1/2`

Answer: The remaining cake is `1/2`

Example 2: Find the coefficients of k in the following algebraic expressions: 4k2 – 2k +1

Solution:

Given 4k2 – 2k +1

The coefficient of k2 is 4

The coefficient of k is -2

Answer: The coefficient of k is -2

Example 3: Find the exponent of following the number: 64

Solution:

Given 64

64 = 6 * 6 * 6 * 6 = 36 * 36

= 1296

Therefore, the exponent of 64 is 1296

Answer: the exponent of 64 is 1296


Practice problems for help on 7th grade math:


Problem 1: Susan reduced her weight 0.45% when she exercised. Write the fraction for the given.

Problem 2: James, Scott and Peter are friends studying in 6th standard. In their class exam in algebra, James scored 10 out of 15. Scott scored 12 out of 15. Their average mark was 11. Find that how much Peter got.

Problem 3: Find the other angle. Given 45° and 75°


Solutions for help on 7th grade math:


Solution 1: `45/100` (or) `9/20`

Solution 2: Peter scored 33.

Solution 3: 60°

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