Slide a repeating decimal's digits by ×10, ×100 or ×1000 and hit SUBTRACT — when the tails line up they cancel before your eyes and the fraction falls out.
Two rails carry the digits of a repeating decimal with a fixed decimal point; shifting a rail multiplies by a power of ten and SUBTRACT is the move — if the repeating tails sit in the same columns they fade out leaving 99x = 27, otherwise the difference stays a red repeating decimal and you re-shift. Mixed decimals like 0.1666… need two shifts (100x − 10x), and Forge mode hammers the result down to lowest terms. It drills the shift-and-subtract method behind 8.NS.1 and targets the misconception that 0.333… is 'about' 1/3 rather than exactly 1/3. Best for Grades 7–8.
A free, no-signup, no-ads math game for Grade 8 — practising repeating-decimals, rational-numbers, fractions. Play in your browser on the KidsDoMath games hub or explore more Arithmetic games.
By grade level: 8th Grade Math Games
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What math does Repeating Fraction Forge practice? Repeating Fraction Forge practices Repeating Decimals, Rational Numbers, Fractions. Two rails carry the digits of a repeating decimal with a fixed decimal point; shifting a rail multiplies by a power of ten and SUBTRACT is the move — if the repeating tails sit in the same columns they fade out leaving 99x = 27, otherwise the difference stays a red repeating decimal and you re-shift.
What grade is Repeating Fraction Forge for? Repeating Fraction Forge is built for Grade 8 (ages 13–14). It sits in the Arithmetic strand, and it ramps across 8 levels so younger or older players find their own pace.
How do you play Repeating Fraction Forge? Slide a repeating decimal's digits by ×10, ×100 or ×1000 and hit SUBTRACT — when the tails line up they cancel before your eyes and the fraction falls out.
Is Repeating Fraction Forge free to play? Yes. Repeating Fraction Forge is free, with no ads and no sign-up, and it runs in the browser on a phone, tablet or computer.