Pick a Shift
Eight hauls or survival with three lives. Easy uses one whole and halves through fourths. Hard uses up to three wholes and eighths.
Read the Mix
A mixed number waits on the plaque. You will pour that many gold chunks.
Pour the Gold
Tap an empty cavity to drop an ingot. Tap again to lift it. Fill the whole molds, then only the leftover gold.
Read the Improper Fraction
Gold chunks over cavities in one mold. The next haul rolls in.
See the Molds
Each iron mold is one gold bar cut into equal chunks. That count is the denominator.
Pour the Mix
Fill every whole mold. Then pour only the leftover gold in the last mold. That total is the improper numerator.
The Fraction Appears
When the gold matches the mix, 5/3 lights up. One extra chunk is a miss.
Score You Chase
A clean haul starts at +100 and climbs with the streak. A perfect eight-haul run adds a shaft bonus. Best scores save per mode and difficulty.
Lode Crack is a mixed-number conversion game. Each iron mold is one gold bar cut into equal chunks. Students pour the mix, then see the same amount as an improper fraction. Buttons and labels follow the site locale.
Denominator First
Kids see equal cavities in a mold before they name the fraction. The bottom number is how many chunks make one gold bar. For 5/3, that is three cavities in every mold.
Numerator Is the Haul
Whole molds plus leftover gold. The top number is how many ingots you poured.
Tap, Don't Type
No keypad. Pouring the gold is the answer. The digits appear after a clean haul.
A Score That Moves
Point pops and a streak make converting a mix feel like a rush in the shaft.
The bottom number is how many equal cavities sit in one mold. The top number is how many gold chunks you poured.
That is a miss. The extra cavity stays empty. The streak resets. In survival you lose a life.
Yes. Tap a gold chunk to lift it before the haul is complete.
How many wholes and how fine the molds are. Easy uses one whole and 2, 3, or 4 chunks per mold. Hard uses up to three wholes and eighths.
Fourth and fifth grade, when students rewrite a mixed number as an improper fraction.