2 Length, area, volume, weight, time, angle, perimeter, volume, surface area, shadow, diameter, radius, side length, length, width, height, edge length and base.
3 Add, subtract, when, divide, square, ten, hundred, thousand, million,110, 1%,11000, sum, difference, product, and so on.
Distance, speed, time, along the fast, reverse fast, static fast, Jiangsu, along the line, countercurrent, reverse direction, parallel flow, at the same time, in the same place, meet, surpass, time zodiac, mouse, cow, tiger, rabbit, dragon, snake, horse, sheep, monkey, chicken, dog, pig, Monday, Tuesday. Month and day expressions, numerical expressions, smooth expressions (such as first, first, first day, first row, first line, etc.), average, period, prime number, divisible number, least common multiple, greatest common divisor, natural number, integer, fraction, decimal, odd number, even number.
Geometry, ruler, itinerary, kilogram, gram, ton, meter, decimeter, centimeter, kilometer, millimeter, square centimeter, square decimeter, square kilometer, cubic centimeter, cubic decimeter, cubic meter, milliliter, liter, second, divided by, one quarter, hour.