Nere
Decimal Depths
Tenths and hundredths in the dark water. Place value, not the number of digits, decides which depth is deeper.
Gates you can reach in any order: Trenches, Harbors, Gauges, Docks, Currents, Nets, Shares.
1. Tenths Trench
TrenchesA trench is marked in tenths. You choose a depth, then whether to build the decimal or read it as a whole number.
Grades 4 · decimal-tenths
2. Hundredths Harbor
HarborsFine gauges need hundredths. You choose a gauge, then whether ten hundredths make a tenth.
Grades 4, 5 · decimal-hundredths
3. The Pressure Gauge
GaugesTwo pressures must be ordered. You choose a pair, then whether more digits means more pressure.
Grades 4, 5 · compare-decimals
4. Fraction-Decimal Dock
DocksA dock must match a fraction to a decimal. You choose a name for the same amount, then whether they are equal.
Grades 4, 5 · decimal-fraction
5. Repair Currents
CurrentsCurrents add and subtract depths. You choose an operation, then whether to line up the decimal points.
Grades 5 · add-sub-decimals
6. The ×10 Current
CurrentsA current multiplies a decimal by 10 or 100. You choose the power, then whether to shift or to add a zero in the wrong place.
Grades 5 · decimal-times-ten
7. Decimal Nets
NetsA net is a rectangle of tenths. You choose the sides, then whether tenths times tenths are hundredths.
Grades 5 · multiply-decimals
8. Sharing the Air
SharesAir tanks are shared among divers. You choose a team, then whether to divide the decimal or split only the whole-number part.
Grades 5, 6 · divide-decimals