"You need to read this book." —Adam Grant, #1 New York Times bestselling author “A great book changes the world you live in, revealing mysteries you didn't even know were there. This is a great book." —Sendhil Mullainathan, MacArthur fellow and author of Scarcity “Klotz shows us how deleting things from our lives can lead us to exciting new places.”—Carol Dweck, author of Mindset We pile on “to-dos” but don’t consider “stop-doings.” We create incentives for good behavior, but don’t get rid of obstacles to it. We collect new-and-improved ideas, but don’t prune the outdated ones. Every day, across challenges big and small, we neglect a basic way to make things better: we don’t subtract. Leidy Klotz’s pioneering research shows us what is true whether we’re building Lego models, cities, grilled-cheese sandwiches, or strategic plans: Our minds tend to add before taking away, and this is holding us back. But we have a choice—our blind spot need not go on taking its toll. Subtract arms us with the science of less and empowers us to revolutionize our day-to-day lives and shift how we move through the world. More or less.

You can subtract two-digit numbers. See how mental math, models, and place value can help you.

Numbers and math can be fun! In this bright and cheerful book, young readers will learn basic math principles and facts through easy and entertaining games that teach about addition and subtraction. Thoughtful questions help students consider more about the principles in play, and helpful tips assist educators in guiding them to learn more.

Presents comprehensive overview of addition and subtraction of whole numbers to be used in classrooms or at home.

Presents comprehensive overview of addition and subtraction of whole numbers to be used in classrooms or at home.

Closely aligned with the national standards, this packet helps students review adding and subtracting whole numbers and decimals. Engaging formats and fun activities (including puzzles, riddles, and games) offer solid review opportunities. Answer key is included.

Presents comprehensive overview of addition and subtraction of whole numbers to be used in classrooms or at home.

All students can learn about adding and subtracting fractions through text written at four reading levels. Symbols on the pages represent reading-level ranges to help differentiate instruction. Provided comprehension questions complement the text.

In the book Subtract on a Number Line, it introduces strategies to use when subtracting. Students use a number line to subtract.