Teacher2Teacher |
Q&A #9409 |
From: Loyd
To: Teacher2Teacher Public Discussion
Date: 2005092912:20:51
Subject: Re: basic math
On 2005092816:38:38, maxine robertson wrote: > >Please help with finding and solving: x + 3/8 + 3/8 =5/12 > >also 3/5 x 13.65 - 2/9 x 1.307 > Start with this one: x + 3/8 + 3/8 =5/12 The lesast common denominator (LCD) is 8x12 or 96. Multiply each term by the LCD and: 96x + 36 + 36 = 40 96x = 40-72 96x = -32 x=-32/96= -1/3 For the other one, multiply first and then subtract. 3/5 x 13.65 - 2/9 x 1.307 Set up as follows: 3x13.65 - 2 x 1.207 -------- ----------- 5 9 8.19 - .2682222 repeating Just subtract the two numbers.
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