Math Mammoth Place Value 3 is a short worktext meant for third grade level. It focuses on place value with four-digit numbers, and adding and subtracting such numbers. We also study rounding and estimating, which are very important skills for everyday life.
First, students study place value with four-digit numbers, writing four-digit numbers in expanded form, and comparing.
Next, they practice some mental addition and subtraction. The lesson stresses the similarities between adding and subtracting four-digit numbers and adding and subtracting smaller numbers. Practicing mental math also helps to build number sense.
After that we study regrouping in addition and subtraction, using four-digit numbers. The last major topics in this book are rounding numbers to the nearest hundred and estimating. Students also get to do some more word problems.
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