Arithmetic Operations
Students move from whole numbers to multiplication with decimals, again using place value as a guide to reason and make estimations about products.
Multiplication is explored as a method for expressing equivalent measures in both whole number and decimal forms.
A similar sequence for division begins concretely with number disks as an introduction to division with multi-digit divisors and leads student to divide multi-digit whole number and decimal dividends by two-digit divisors using a vertical written method.
In addition, students evaluate and write expressions, recording their calculations using the associative property and parentheses.
Students apply the work of the module to solve multi-step word problems using multi-digit multiplication and division with unknowns representing either the group size or number of groups.