Sentence to equation Week 18 blog post What

Sentence to equation Week 18 blog post

What to look for • In word equations there are certain words you have to look for that tell you the structure of each equation. • Ex; is means equals • More than = + • Less than = -

Step 1; introduce variables to represent unknown variables • The first thing to do in a word equation is deciding what variable to use for each thing you’re trying to find. • Ex: A rectangle is to be drawn with perimeter 64 cm. if the length is 14 more cm then the width, determine the area of the rectangle. • In this equation we need to find the length and width of the rectangle, so we right that out as; • Let L= Length • W= Width

Step two; make the equations part 1 • In word equations, the easier ones are usually one equation per sentence. • Ex: A rectangle is to be drawn with perimeter 64 cm. if the length is 14 more cm then the width, determine the area of the rectangle. • In this equation, the first sentence can be made into an equation. Here is when we have to know what to look for. The key words in the first sentence are (Perimeter) and (is). Since it says that the rectangle “Is” to be drawn… this means that the equation the perimeter (2 L +2 W) “Is” 64 cm. So, the first equation is 2 L+2 W=64

Step two; make the equations part 2 • A rectangle is to be drawn with perimeter 64 cm. if the length is 14 more cm then the width, determine the area of the rectangle. • In the second equation the first key word is “is” which means =. This means that the end of the equation will be =L. The next key words in the equation are “ 14 more cm then the width”. This means that W+14=L. • And with that, we have our two equations; 2 L+2 W=64 and W+14=L.