CK-12 Foundation
Mental Math to Divide by Whole Number Powers of Ten: Bouncing Decimal Point
Five questions challenge mathematicians to divide whole numbers by powers of 10. A tool highlights how a bouncing decimal moves through the divisor. Question types include multiple choice and fill in the blank. A discussion question...
Curated OER
Mental Math
In this multiplication worksheet, students use mental math strategies to multiply 2 digit numbers together. Students complete 7 problems.
Curated OER
Mental Math Counts
Students use mental math. They describe reasonable and unreasonable sums and differences. Students use mental math to find the sums and differences of addition and subtraction facts at random. They solve addition and subtraction facts...
Curated OER
Mentally Add and Subtract 10 or 100
Don't let the title of this one fool you; scholars skip count only by 10 in this number sequence learning exercise. They fill in missing numbers on a number line to complete each sequence, adding or subtracting 10. There are two addition...
Curated OER
Mentally Add and Subtract 10 or 100
Get your mental mathletes in top form with this number sequence worksheet! They must add or subtract 10 from a number to complete these number lines, finding the missing three-digit numeral from a list of answers. Encourage verbal or...
Curated OER
Mentally Add and Subtract 10 or 100
Find the missing digits in these number sequences. Each of the ten has one missing number and scholars must figure out what it is. Here's the pattern: all of these sequences involve counting by 10s. Learners add or subtract 10 to...
Mental Arithmetic
Mixed Addition and Subtraction Year 1
Reinforce addition and subtraction with a 30-problem arithmetic activity in which scholars add and subtract numbers between one through 10.
Curriculum Corner
Bugs and Flowers Math and Literacy Centers
The sun shines, flowers bloom, and bugs fly—it must be Spring! Add a cheerful theme of bugs and flowers to math and literacy centers. Scholars take part in an assortment of activities designed to reinforce concepts such as...
Curated OER
Mentally Add Two 2-Digit Numbers pg. 1
Mental math addition is the focus of this worksheet. Learners apply a strategy outlined in the worksheet to find the sums. In this worksheet, students find the answers for twenty problems. Answers appear at the end.
Curated OER
Mental Math Methods
In this mental math worksheet, students use mental math methods to solve problems. Students complete 1 addition, 1 multiplication, and 1 subtraction problem using these methods.
Curated OER
More Addition in Your Head- Mental Math
In this addition mental math learning exercise, learners answer 12 questions by doing addition in their heads. They complete 8 more questions by adding after reading the problems which include key words such as increase, altogether,...
Curated OER
Mental Math and Money Problems
In this money instructional activity, students find the total cost of buying items by adding European money using mental math. Students complete 12 problems.
Curated OER
Mental Math
In this mental math worksheet, students try to solve problems without using a pencil and paper. Students master 12 single digit problems and 4 double digit problems.
Curated OER
Adding Up
Sail through the land of three addends with this nautical-themed addition learning exercise. Scholars begin by using mental math to add seven sets of three numbers located on sailboats. Next, they apply this concept to eight horizontally...
Curated OER
Adding in Our Heads
A good presentation on adding two-digit numbers. Learners are shown how to partition the numbers before trying to add them in their heads. A frog is the featured teacher of the PowerPoint, and he leads viewers through many problems and...
Houghton Mifflin Harcourt
Unit 2 Math Vocabulary Cards (Grade 3)
A set of third grade math vocabulary cards include topics that range from addition properties to terms like estimate and fact family. Each sheet has two cards on it. The top half is the word printed in bold text,...
Curated OER
Mental Math: Add Tens Practice 10.1
In this adding tens worksheet, students solve 11 problems in which tens are added. Students may use a basic fact to help. Example: 2 tens + 1 ten.
Curated OER
Mental Math Skills
For this mental math worksheet, students use a number line to count backwards and forwards, add doubles, add and subtract one, and add one-digit numbers. Students solve thirty problems.
Curated OER
Addition Practice #1
Show young mathematicians that they are fully capable of mentally adding two-digit numbers. They start by solving 12 two-addend problems (all with two-digit numbers and aligned horizontally). There is no room to show work. Consider...
Curated OER
Multiplying by 100
In this math activity, students learn the tricks to multiply any number by 10, 100 or 1000. There are 75 problems on 3 pages, both written horizontally and vertically with instructions and picture illustrations to help students.
DK Publishing
Real-Life Word Problems
Prepare your second graders for word problems with a straightforward review worksheet. Use it after a unit on addition and subtraction up to 100, or after you have worked on money math. A sample word problem prompts young learners to...
Illustrative Mathematics
Fundraising
In order to solve for who raised the most money, learners will need to choose an appropriate math strategy or tool to help them. Two possible solutions, one involving pictures and one involving abstract thought, are presented in the...
Curated OER
Math: Navigating the World Around Me
Young mathematicians research and discuss real world math word problems and ways in which they apply math concepts in their everyday lives. They create a storyboard of a math word problem from which they create a slide for a multi-media...
Curated OER
Mentally Add 3 Digit Numbers
In this addition worksheet, learners are shown how to add two 3 digit numbers in your head mentally. There are 18 problems for the students to try to work in their head.
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