add determine the sum of |

addition a quantity that is added; something added to what you already have |

analog clock a clock that displays the time of day by the position of hands on a dial |

capacity mental or physical ability; ability to accommodate |

certain reliable in operation or effect; having or feeling no doubt |

clock a timepiece that shows the time of day |

cone a shape whose base is a circle and whose sides taper up to a point |

corner position at which two lines, surfaces, or edges meet and form an angle |

cylinder a surface generated by rotating a parallel line around a fixed line; a cylindrical container |

digit one of the elements that collectively form a system of numeration |

digital clock a clock that displays the time of day digitally |

double twice as great or many |

face confront; encounter; be opposite |

fewer than not as many as |

figure a diagram or picture illustrating textual material |

half-hour 30 minutes |

hexagon a six-sided polygon |

hour a period of time equal to 1/24th of a day |

hour hand the shorter hand of a clock that points to the hours |

impossible not capable of occurring or being accomplished or dealt with |

large above average in size or number or quantity or magnitude or extent |

line plot a graphical display of a set of data where each separate piece of data is shown as a dot or mark above a number line |

mass the property of something that is great in magnitude |

measure determine the size of something; mark, lay out, or establish dimensions; estimate by evaluation or comparison |

medium state that is intermediate between extremes |

minus less; requiring to be subtracted; negative |

minute a unit of time equal to 60 seconds or 1/60th of an hour |

minute hand the hand on a watch or clock that indicates minutes |

multi-step involving multiple steps |

non-standard not standard; not accepted as a model of excellence |

parallelogram a quadrilateral whose opposite sides are both parallel and equal in length |

place value the numerical value that a digit has by virtue of its position in a number |

plus involving advantage or good; on the positive side or higher end of a scale |

prism a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms |

rectangular having the shape of a rectangle; having one or more right angles |

representation act of representing; standing in for someone or some group and speaking with authority in their behalf |

side an extended outer surface of an object |

single-step a process in which a program can be performed one instruction |

skip count counting by a number that is not 1 |

small slight or limited; especially in degree or intensity or scope |

square rectangular shape |

strategy elaborate and systematic plan; plan of action intended to accomplish a specific goal |

subtract remove a part from the whole |

subtraction reduction; deduction; removing a part from the whole |

take away take from a person or place; take out or remove |

tallies current score or amount |

tally mark unary numeral system used for counting |

time a suitable moment |

trapezoid a quadrilateral with two parallel sides |

unit an assemblage of parts that is regarded as a single entity |