Numbers and Addition


Review – 2nd Grade Skills

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2.1.1 Write, compare and order whole numbers to at least 1000.

2.1.2 Understand and apply base ten numeration and count in multiples of 1, 2, 5, 10 and 100.


2.1.3 Compose and decompose whole numbers less than 1000 by place value (e.g., 426 as 4 hundreds + 2 tens + 6 ones).

2.2.3 Develop fluency with efficient procedures for adding and subtracting multi-digit whole numbers and understand why the procedures work on the basis of place value and number properties.

2.2.4 Select and apply appropriate methods to estimate sums and differences or calculate them mentally depending on the number and context involved.

http://www.studyzone.org/testprep/math4/d/estimatingaddsubl.cfm

Review

Practice

Estimating and Roundinghttp://www.numbernut.com/advanced/estimate_intro.shtml

Estimate sums to the nearest ten.

Rounding Flashcards

Estimating

Review

Review

Review

Review

Practice

Practice

Practice

Practice

Watch the story

Addition of 3 digit numbers

Practice Sheet

Adding Numbers With Regroupinghttp://www.studyzone.org/testprep/math4/e/addwholew3l.cfm

Addition

IXLhttp://www.ixl.com

3rd C-Addition

D-Subtraction

IXLhttp://www.ixl.com
IXLhttp://www.ixl.com
IXLhttp://www.ixl.com
IXLhttp://www.ixl.com

A.10

A.6

B-Place Value

3rd-J-Estimation and Rounding

Adding Numbers http://www.studyzone.org/testprep/math4/e/addwhole3l.cfm
3.1 computer math homework - Addition with RegroupingNumbers_and_Addition_files/3.1%20computer%20math%20homework.notebookNumbers_and_Addition_files/3.1%20computer%20math%20homework.notebookshapeimage_16_link_0shapeimage_16_link_1

Make sure to open these files with Firefox.

Input and Output Tables

4th Grade - H.1 and H.2

Function Machine