 Addition to 1,000 by counting, with hundreds

# Addition to 1,000 by counting, with hundreds

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## General

Students learn to add numbers to 1,000 by counting with hundreds.

2.NBT.B.7

## Relevance

Discuss with students that it is important to be able to add to 1,000, so you can determine totals of large amounts.

## Introduction

The entire class counts forward or backward by turns. The interactive whiteboard gives starting numbers and if they should count forward or backward. Certain numbers have "special" effects, such as the 0 means that student must stand and spin in a circle.

## Development

Check that students understand adding to 1,000 by asking the following question:
- How do you calculate 27+400?
- And 300+261?

## Guided practice

Students first practice adding two addends with visual support, then are given an abstract addition problem, and then are given a story problem to solve.

## Closing

Discuss with students that it is important to be able to add to 1,000, so you can determine the totals of larger amounts and determine the totals. Show a few addition problems on the interactive whiteboard and challenge students to solve as many problems as they can within the given time. When the time has run out, discuss the answers with the class.

## Teaching tips

Students who have difficulty adding to 1,000 can use the number line as support. Show that they can take steps on the number line in different ways, they can take larger or smaller steps, depending on what makes it more clear to them. They can also use scratch-paper to calculate. 