Math Mammoth Add & Subtract 4

Math Mammoth Add & Subtract 4Math Mammoth Add & Subtract 4 is a workbook for 4th grade, and it covers the following topics related to addition and subtraction: mental addition and subtraction strategies; adding and subtracting in columns; some numerical patterns; bar models in problem solving; order of operations; line graphs and bar graphs; rounding and estimating; money problems and discounts. At first, we review the "technical aspects" of adding and subtracting: mental math

Math Mammoth Add & Subtract 4 is a workbook for 4th grade, and it covers the following topics related to addition and subtraction:

- mental addition and subtraction strategies;
- adding and subtracting in columns;
- some numerical patterns;
- bar models in problem solving;
- order of operations;
- line graphs and bar graphs;
- rounding and estimating;
- money problems and discounts.

At first, we review the "technical aspects" of adding and subtracting: mental math techniques and adding and subtracting in columns. We also study some patterns. The lesson on Pascal's triangle is intended to be fun and fascinatingÑafter all, Pascal's triangle is full of patterns!

In the next lesson, we study the connection between addition and subtraction and bar models. Bar models help students write addition and subtraction sentences with unknowns, and solve them. This is teaching the students algebraic thinking: how to write and solve simple equations.

The lesson on the order of operations contains some review, but we also study connecting the topic with real-life situations (such as shopping). Here, the student writes the mathematical expression (number sentence) for word problems, which again, practices algebraic thinking.

Going towards applications of math, the book then contains straightforward lessons on bar graphs, line graphs, rounding, estimating, and money problems.