Planes, boats, cars, trucks, drones, helicopters, batteries, motors, gearing, scale models and race planning.

100 tools for quantities, motion, forces, energy, heat, electricity, waves, light, weather and chemistry.

Recipe scaling, portions, ingredient budgets, pans, hydration and kitchen quantities.

Pace, race times, scores, practice budgets and performance percentages.

Density, deposits, terrain gradients, erosion volumes and geological rate models.

Measured rainfall, water storage, flow rates and weather unit relationships.

DC circuits, resistors, capacitors, inductors, signals and battery arithmetic.

Planting layouts, water volume, crop yield, field budgets and input quantities.

Angular measurements, telescopes, light travel, apparent size and orbital classroom models.

Quotes, costs, inventory, revenue, margins and simple operating ratios.

Tempo, rhythm, note frequencies, recording timing and practice planning.

Proportion, symmetry, layout, scale, geometric patterns and material budgets.

Exposure ratios, image geometry, print density, storage and shoot budgets.

Fabric, quilts, stitches, patterns, seams and project costs.

Elapsed time, offsets, budgets, exchange-rate scenarios and travel pace.

Production, takt, yield, throughput, material and cost models.

Wheels, gearing, differential-drive models, robot arms and measured power.

Outcome counts, probabilities, dice, cards, combinations and expected-value models.

Density, observed rates, shares and population scenario arithmetic.

Map scales, measured distances, coordinates, areas and route geometry.

Stock, shelves, cartons, turnover, demand and basic ordering arithmetic.

Seats, tickets, food quantities, staffing budgets and attendance ratios.

Measured diversion, collection, containers, mass and costs.

Historical number-system arithmetic, cycles, ratios and user-entered historical measurement factors.

User-entered payment schedules, ownership shares, document amounts and time-unit arithmetic.

Lumber, cut lists, panels, joints, shop costs and project planning.

Filament, spool budgets, layers, geometry, measured calibration and print planning.

Room work rates, crew hours, bids, supplies, laundry and operating budgets.

Trip time, fuel, campsite budgets, water, electricity, storage and measured weight arithmetic.