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📏 Measurement
Length, mass, area, time… Choosing sensible units and converting accurately — measurement is everywhere.
- 01📏Metric Units & ConversionFrom millimeters to kilometers, every conversion is just multiplying or dividing by a power of ten.
- 02🟩AreaHow many 1-by-1 tiles does it take to fill a shape? That count is the area.
- 03⛰️Triangle & Compound AreasA triangle is half a rectangle and compound shapes split apart — two ideas that unlock the next level of area.
- 04📦VolumeStart by counting cubes, end with the cuboid formula — from cubic centimeters to liters.
- 05🥫Volume of Cylinders, Cones & SpheresCounting cubes stops at the box — cylinders, cones and spheres each bring one formula, and all three are relatives of the circle.
- 06🎁Surface AreaUnfold the solid and add up every face — wrapping a gift, painting a can, wallpapering a room, all the same question.
- 07⏰Time & Conversion60 seconds, 60 minutes, 24 hours — the units you use most refuse to be decimal.
- 08🕐Telling TimeThe hour hand strolls, the minute hand dashes — learn how the two hands divide the work and every clock face opens up.
- 09🌡️TemperatureThe same water reads 25 on one scale and 77 on another — temperature has three rulers, each with its own conversion rules.
- 10🔍Accuracy & PrecisionEvery measurement carries error — learn to read precision, count significant figures, and report honestly with "about" and "±".
- 11🗺️Scale DrawingsMaps and blueprints shrink the world by a fixed ratio — 1 unit on paper stands for 100 in real life.