Ready for a speed-calculate challenge? Great! This workbook is all about mental math and estimation. Use bar models, number bonds, and rounding to solve the puzzles. Grab your pencil, and let's get started!

Want to level up your math skills? Try mental math and estimation! In this workbook, you'll use number bonds and bar models to find exact answers, and rounding to estimate. You'll also practice spotting the greatest and least rounded numbers on a number line. Enjoy the challenge!