The Everyday Math Workout

What this book teaches

The everyday arithmetic that runs a normal life: reading a percent so a sale never fools you, adding and scaling fractions when a recipe changes, doing the two-second mental math that stops you reaching for the phone, using ratios and proportions the way cooks and builders do, taking the first useful step into algebra, converting between the units the world keeps mixing, and pulling a plain summary — mean, median, mode, range — out of any pile of numbers. Series brand: Math Didn't Have To Be This Hard.