## Addition and Subtraction

Lesson 1 - Algebra: Addition Properties and Subtraction | I will use addition properties and subtraction rules to add and subtract. |

Lesson 2 - Estimate Sums and Differences | I will estimate sums and differences of numbers. |

Lesson 3 - Problem-Solving Skill: Estimate or Exact Answer | I will determine when to estimate or find an exact answer. |

Lesson 4 - Add Numbers | I will add numbers, including multidigit numbers. |

Lesson 5 - Subtract Numbers | I will subtract multidigit numbers. |

Lesson 6 - Problem-Solving Investigation: Choose a Strategy | I will choose the best strategy to solve a problem. |

Lesson 7 - Subtract Across Zeros | I will subtract multidigit numbers, when some digits are zero. |

Study Guide and Review | |