Subtraction is taking away one number from another. Lilly has 4 balloons, but then one flys away. How many does she have left? You can use subtraction to find the answer. First there were 4 balloons.

Subtraction is taking away one number from another. When you subtract it gives you the difference between two numbers. Here are 7 blocks. If you take away three blocks, how many are left? There would ...

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The National Council of Teachers of Mathematics is a public voice of mathematics education, providing vision, leadership, and professional development to support teachers in ensuring mathematics ...

It took an earthquake to convince one city to do away with a double-decker highway. City planners in San Francisco had tried for years to get approval for removing the Embarcadero Freeway that blocked ...

Can people make things better by subtracting from what exists? As examined in research by Darden Professor Gabrielle Adams, when people are trying to solve a problem, they focus on what they might add ...

Simple doesn't just sell, it sticks. Simple made hits of the Nest thermostat, Fitbit, and TiVo. Simple brought Apple back from the dead. It's why you have Netflix. The Fisher Space Pen, the Swiss Army ...