Synthesizing addition and subtraction strategies to solve multi-step word problems.

Developing strategies to subtract from numbers with zeros in the tens or ones place.

Applying place value understanding to subtract when a hundred must be decomposed into tens.

Visualizing the decomposition of a ten into ten ones during subtraction using base-ten drawings.

Using addition to solve subtraction by finding the difference between two numbers on a number line.

Subtracting 2-digit and 3-digit numbers by jumping back on an open number line.

Practicing addition with regrouping tens into a hundred using base-ten diagrams and place value charts.

Using base-ten representations to visualize regrouping ones into a ten during addition.

Using open number lines to add 3-digit numbers by making jumps of hundreds, tens, and ones.

Introduction to addition within 1000 using expanded form to emphasize the value of each digit.

Extending rounding concepts to the nearest 100 using place value positioning on a 0-1000 number line.

Students use number lines to round numbers within 100 to the nearest 10, focusing on the halfway point as a decision maker.

A cumulative review and hands-on design task where students apply all area skills learned in the sequence.

Learning that the total area of a large rectangle is the sum of its parts, introducing additive area concepts.

Comparing the areas of different garden plots and identifying that different shapes can have the same area.

Given the total area and one side length, students use division or multiplication facts to find the missing side length.

Applying area concepts to real-world scenarios like rugs, tabletops, and floors using word problems.