Primary Junction
Adding Tens
Build on your learners' confidence in quick addition as they discover strategies to add tens to two-digit numbers. After reviewing counting by 10's, they discuss tactics to add multiples of 10 to other numbers. They visualize how to...
Curated OER
Multiplying and Dividing Decimals by 10. 100, and 1,000
Multiplying decimals by 10s, 100s, and 1,000s is easy once a student knows how to manipulate the decimal point. This short presentation covers this exact topic and does a good job of helping to show learners how easy it is to manage the...
Curated OER
Countdown Challenge: Multiplication by 10s
In this multiplication by 10s worksheet, 5th graders solve and complete 30 different problems that include multiples of 10. First, they complete the problems in the first section by multiplying each number given times 10. Then, students...
Curated OER
Round Each Number to the Nearest 100
In this math worksheet, students round 3 digit numbers to the nearest 100. In the chart students analyze the 3 digit number, check whether it should be rounded up or down, then write the rounded number.
Curated OER
Count by 5s,10s, and 100s Step-by-Step Lesson
Show young mathematicians how to skip count. The three problems at the top of the worksheet are followed by written and numerical explanations of how to use adding-on strategies to solve the problems.
Curated OER
Addition: 3-Digit Sums (Carrying Tens)
For this addition practice worksheet, students improve their math skills as they solve 30 problems that require them to add 2-digit numbers to 2-digit numbers
Curated OER
The Number System
Students explore how to multiply and divide by 10, 100, and 1000. In this computation instructional activity, students participate in an online activity using the interactive whiteboard. Students generate sums by using dice.
Curated OER
The Hundreds Board
Students explore the concept of multiples and use a hundreds board to add numbers and then graph them. Afterward, they use the sieve of Eratosthenes to identify prime numbers and discover how numbers change when you add or subtract by ten.
Pennsylvania Department of Education
Adding and Subtracting Three-Digit Numbers by Jumping
Second graders use data to graph information and draw conclusions. In this instructional activity on data analysis, 2nd graders practice gathering, sorting, comparing, and graphing data. Students differentiate data that can and cannot...
Curated OER
Big Steps
Second graders practice developing strategies for mental calculation when counting in 10s and 100s. They mentally perform calculations involving addition and subtraction to be able to state the difference between numbers by counting in...
Curated OER
Counting in Ten's and Two's
In this counting worksheet, students complete activities, first counting in ten's, then two's. Students give numbers that are 10 more or less, 2 more or less, circle and write numbers that = 10 and solve number problems.