Showing Results for estimating to subtract

Many students cringe when they see a subtraction problem with multiple zeros. The “Subtract One” strategy in this lesson involves reducing the top number by one to turn the 0 digits into 9’s and then adding the one back in at the end.

Can you break a ten? An everyday exchange of money can help students think about regrouping to subtract. Students will use bundled popsicle sticks to see how values grouped into tens can be regrouped into ones to allow us to subtract.

Help your students subtract with confidence by sharing two different strategies. Use this lesson to build on students’ understanding of subtraction and to evaluate this key skill.

This lesson introduces students to measuring and estimating liquid volume, using liters (l) as the standard unit of measurement.

Teach your students to add and subtract time using number lines. Your class will be gladly moving backwards and forward to the minute solving for related word problems.

Start your students on subtracting three-digit numbers with this lesson that breaks the problems down by place values!

Get your students explaining estimations and measurements of liquid volumes and masses of objects! Use this lesson independently or alongside Estimating Measurements of Mass and Volume Using Metric Units.

Students will become more familiar with common metric measurements by matching everyday objects with the metric mass and volume units they would use to measure them.

Master rounding and estimating skills by having students challenge their classmates in the Make a Big Difference game. Roll three dice two times to arrive at two three-digit numbers. The largest difference wins!

In this lesson, students will practice strategies of subtracting time and apply them to real life scenarios. Also, use this game with the lesson that teaches addition of elapsed time called Beyond Just Addition.

Don't throw away all of those extra copies of your book order forms! They make great springboards for math lessons. This lesson integrates them into activities designed to help young learners with money math.

This lesson helps students review rounding to the nearest hundred. Your students will practice rounding using manipulatives.

With this pastry themed lesson, your students will apply addition strategies to solve two-step, three-digit addition word problems. Finding the solutions will be sweet!

Your students will feel confident in their rounding abilities after this lesson that has them learn how to round numbers to the nearest ten both individually and with a group.

Teach your students a vital life skill with this lesson on telling time to the nearest minute! Students will be hands on changing the times on their own clocks and get plenty of practice reading times both with the class and individually.

Using base ten blocks, cards, and clear cups, your students will practice the concept of borrowing for subtraction problems in this lesson.

Word problems can be overwhelming to students, but if they have a tool to help them, they can handle it! Use this as a stand alone lesson or alongside Stepping Through Addition and Subtraction Word Problems.

Happy Valentine’s Day! Use this fun hands-on lesson with your students to practice solving division problems with one-digit divisors. Students will explore different strategies they can use to solve division problems.

Help! The numbers in our equations have run away and left their answers alone! In this lesson, students will review their math facts and knowledge to solve Ken Ken like puzzles and bring the numbers back to their places.

Use this lesson to teach your students how to determine if they should use addition, subtraction, or both operations to solve a word problem by following four simple steps.

Teach your students to confidently follow the steps of regrouping in subtraction problems. Use this as a stand alone lesson or alongside Regrouping with Popsicle Sticks: Double-Digit Subtraction.

In order to build a strong foundation with fractions, students should be able to explain the concept and their thinking. Use this as a stand alone lesson or as a pre-lesson for Let's Play Equivalent Fractions!

Get your students thinking about how the number line and the word problem are related! Use this lesson alongside Get There On Time: Elapsed Time Word Problems or on its own.