This workbook will help kids master solving equations mentally. Students will perform addition and subtraction mentally without consulting a number line or using their fingers. They should be able to add or subtract a single-digit number from a two-digit number and perform basic addition or subtraction with two-digit numbers. They should be able to round to the nearest 10 or 100 to get estimates to double-check their work. Students should know the multiplication tables by heart for numbers up to 10. They should have the ability to perform simple mental multiplication. After kids master these skills, they will begin to be comfortable with mental math problems involving multiple operations, and they will be able to solve a problem like "subtract 4, then multiply by 3," in their head. This workbook will lead them to use math better in real-world situations, such as if they have enough money to buy things at the store.