Place Value Subtraction vs Math Clock, by MLC

Place Value Subtraction helps students understand subtraction using place value discs. A strong understanding of place value in the base ten system is essential for long-term mathematical learning. In subtraction, place value helps students understand how regrouping works. The app provides a visual, step-by-step way to subtract two numbers using place value discs. Students can solve randomly generated problems or enter their own problems. Features: * Numbers with 1–3 digits * Randomly generated problems * Custom problems * Visual place value discs * Step-by-step subtraction practice * Clear visualization of regrouping Part of the iDevBooks Place Value series: * Place Value Addition * Place Value Subtraction * Place Value Multiplication * Place Value Division Other iDevBooks Math Apps: Other iDevBooks math apps include Visual Fractions Decimals Percentages, Decimal Rounding, Whole Number Rounding, Column Subtraction, Column Addition, Long Division, Long Multiplication, Lattice Multiplication, Partial Differences Subtraction, Partial Quotients Division, Partial Sums Addition, and more. Feedback: New ideas to make this app better are welcome. Please visit idevbooks.com to give feedback. Privacy: This app has no ads, no in-app purchases, and does not transmit user data during operation. The app also does not contain links to other apps or to the web.

Math Clock helps students become fluent working with time. Learners use analog clocks with geared or free-moving hands to learn how to tell time, explore jumps with count by numbers, and visualize story problems involving intervals of time. By placing and shading fraction overlays, students use the clock to contextualize fractions with frequently used denominators. FEATURES • Add clocks with geared or free-moving hands. • Set the time and run a live clock with a second hand. • Display equivalent digital time. • Add minute and hour hand labels. • Jump the minute hand on geared clocks by intervals 1-60. • Use the elapsed time tool to solve problems involving intervals of time. • Overlay and shade circle fractions to explore fractional parts of an hour and fractions with denominators of 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60. • Duplicate and resize clocks to work with multiple clocks at once. • Hide and reveal clocks with resizable covers to create your own problems and model strategies. • Use the drawing tools to annotate work and show understanding. • Add equations, expressions, and descriptions with the math text and writing tools. • Share your work by saving an image or providing a share code to others.  MORE APPS For more Math Clock resources and other apps, visit: www.mathlearningcenter.org/apps LEARN MORE To learn about Bridges in Mathematics, an elementary curriculum that employs an array of visual models, visit: www.mathlearningcenter.org/bridges/overview ABOUT US This resource is brought to you by The Math Learning Center, a nonprofit organization dedicated to K-12 education since 1976. ACKNOWLEDGEMENTS This app was crafted by Clarity Innovations. We help improve teaching and learning by creating solutions that match promising technologies with the needs of education. Visit us: www.clarity-innovations.com