Rational Number RulesSign rules applied to fractions and decimals, plus conversion between forms.7th GradeONE FORM AT A TIMEBefore you apply a sign rule, put both numbers in the same form.Fraction → decimal: divide top by bottom. 3/8 = 0.375Decimal → fraction: say it, write it. 0.35 = 35/100 = 7/20MULTIPLY & DIVIDE — count the minus signs(+) × (+) = +6 × 3 = 18(−) × (−) = +(−6) × (−3) = 18(+) × (−) = −6 × (−3) = −18(−) × (+) = −(−6) × 3 = −18Even number of minus signs → positive. Odd number → negative. Same for ÷.ADD & SUBTRACTSame signs → add the sizes, keep the sign.−3.4 + (−1.2) = −4.6Different signs → subtract, keep the bigger sign.−5/6 + 1/3 = −5/6 + 2/6 = −3/6 = −1/2Subtracting is adding the opposite: a − b = a + (−b).FRACTION · DECIMAL · PERCENT1/2= 0.5= 50%1/4= 0.25= 25%1/3= 0.333…= 33⅓%2/5= 0.4= 40%3/8= 0.375= 37.5%5/6= 0.8333…= 83⅓%Rational Number Ruleslearnposters.com
Rational Number Rules — printable math wall chart from LearnPosters. Free vector PDF, US Letter and A4.

Questions about the Rational Number Rules poster

Who is the Rational Number Rules poster for?
Rational Number Rules is filed under 7th Grade (ages 12–13), so it matches what that year asks a child to remember. It is equally useful to an older student revisiting math, and to the parent or teacher answering the question at the kitchen table.
When should you use the Rational Number Rules poster?
Convert to one form first, then apply the sign rule. A wall chart earns its place by being glanceable from where the work is happening, so Rational Number Rules belongs on the wall where that math work actually happens, within glancing distance, rather than filed away.
What other posters go with Rational Number Rules?
Angle Pairs, Area of a Circle and Box Plots sit alongside Rational Number Rules in the 7th Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Angle PairsArea of a CircleBox Plots
Is the Rational Number Rules poster free to download and print?
Yes. Rational Number Rules downloads as a free PDF with no account, no email and no watermark, like everything else in the 7th Grade set. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Rational Number Rules poster print at?
Rational Number Rules is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Rational Number Rules loses nothing.Printing guide

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