You must have JavaScript enabled to use this site.
{{ toc.signature }}
{{ toc.name }}
{{ 'ml-btn-view-details' | message }}
{{ child.name }}
{{ child.label }}
arrow_drop_down
{{ child.name }}
{{ child.label }}
{{ child2.name }}
{{ child2.label }}
arrow_right
{{ child2.name }}
{{ child2.label }}
arrow_back
{{ 'ml-btn-back' | message }}
{{ stepNode.name }}
{{ child.name }}
{{ child.label }}
arrow_drop_down
{{ child.name }}
{{ child.label }}
{{ child2.name }}
{{ child2.label }}
arrow_drop_down
{{ child2.name }}
{{ child2.label }}
{{ child3.name }}
{{ child3.label }}
{{ 'ml-toc-proceed' | message }}
{{ stepNode.nextSibling.name }}
Lesson
Exercises
Recommended
Tests
An error ocurred, try again later!
Try again
Chapter {{ article.chapter.number }}
{{ article.number }}.
{{ article.displayTitle }}
{{ article.intro.summary }}
{{ 'ml-btn-show-less' | message }}
{{ 'ml-btn-show-more' | message }}
expand_more
{{ 'ml-heading-abilities-covered' | message }}
{{ ability.description }}
{{ 'ml-heading-lesson-settings' | message }}
{{ 'ml-lesson-show-solutions' | message }}
{{ 'ml-lesson-show-hints' | message }}
{{ 'ml-lesson-lock-screen' | message }}
{{ 'ml-lesson-set-timer' | message }}
{{ 'ml-lesson-number-slides' | message : article.intro.bblockCount}}
{{ 'ml-lesson-number-exercises' | message : article.intro.exerciseCount}}
{{ 'ml-lesson-time-estimation' | message }}
Start lesson
Image Credits
expand_more
{{ item.file.title }}
{{ presentation }}
No file copyrights entries found
Theory
Put minus sign in numerator
If either numerator or denominator is negative, the fraction is negative. Therefore, if the negative is in the denominator it can be moved to the numerator without changing the value of the fraction.
-
4
7
=
4
-
7
error
Report error
reply
Share
{{ grade.displayTitle }}