Illustrative Mathematics
Rounding to 50 or 500
In a six-problem learning activity, children are guided to solve word problems that involve rounding to the nearest ten and nearest hundred. A commentary and answer key provide different approaches that learners may take in solving the...
Los Angeles County Office of Education
Assessment for the California Mathematics Standards Grade 3
Assess scholars' knowledge with a 22-page assessment that covers place value, patterns, probability, estimation, measurement, geometric figures; and their ability to add, subtract, multiply and divide proficiently.
Curated OER
Bouncing off the Wall
Students watch a video clips before problem solving the use of angles in real world situations. They problem solve using spatial reasoning while connecting math to a sports activity that investigates the path of a bouncing ball.
Curated OER
Decimals: Worksheet 2
In this decimal worksheet, students solve a total of 31 decimal problems including: writing decimals, determining the smaller of 3 decimals, determining place value, rounding, filling in missing numbers and word problems.
Alabama Learning Exchange
Jelly Beans Add Up
Students explore counting, sorting, and graphing skills. In this data analysis lesson, students sort jelly beans by color, count the jelly beans, and create a bar graph of the jelly beans according to color.
Illustrative Mathematics
Illustrative Mathematics: 3.nbt, 4.nbt Rounding to the Nearest 100 and 1000
This task builds off of the skill of rounding to the nearest ten and hundred in third grade. Aligns with CCSS.Math.Content.3.NBT.A.1 Use place value understanding to round whole numbers to the nearest 10 or 100.
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: The Meaning of Multiplication: Mental Calculation
If you are looking for a website that explains and defines the basics of mental multiplication with helpful hints then you have arrived at an excellent resource. There are even practice problems at the very end of the lesson.
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: Table of Contents
This website from The Math Page explains some helpful hints about how to do mental math.