Estimation and Computation

Strageties & Procedures for Estimation (Section 3.2)

Vocabulary:

Computational Estimation: Is a prcoess for finding a number of reasonably close to the exact answer for calculatio.

Techniques:

1. Estimating a Quainty: Finding how many students, dauys lunches, classes, and so on

Estimating a meausre: Finding how much length, area, volume, and so on.

Estimating Answer: Finding a sum, difference, product, or quotient.

Computational Estimation (Another one for above)

Rounding: Is based on locating the point halfway between consecutive multiples of 10, 100, 1000, and so on.

Games to help with rounding, for kids.

Examples: a.)16,942-7,540=9400

Rounding Activity for kids.

Substitute compatible numbers technique: involves replacing some or all of the numnbers in a computation with number that are easy to compute mentally.

Helpful video to get kids into this section.

Front-end Estimation

Helpful video, idea on maybe the kids each pick a problem and explain it to the class as if they were the teacher!

Clustering

Clustering technique: involves looking for the number about which the addends cluster and then multiplying by the number of addends.

Algorithms for Addition and Subtraction (Section 3.3)

Base Ten Blocks

Perfect game/activity for base ten learning how to count with the blocks!

Expanded Algorithim for Addition

Video perfect for learning tens, ones, and hundreds. Good for young ages. BEGINNER.

The order in which the number with a given place value are added doesn't matter because all partial sums are recorded.

Helpful for Expanded Algorithims.

Standard Algorithm for Addition: There are ten or more ones , we regroup 10 ones as 1 ten and then add the tens.

Algorithms for Multiplication and Division Section (3.4)

Lattice Multiplication

A visual way of multiplying in a pattern. Would work well with visual learners.

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Area model for multiplication: instead of using just the numbers, use the base ten blocks to help you out.undefined

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Really Important for the kid to learn this way as well. It is a more visual way for the students to learn and practice their multiplication.

Helpful worksheets through website for practicing with base ten counting.

Manipulatives: Solving math problems while using base ten blocks. Here is a helpful link to get kids use to the counting with Base ten blocks.undefined

Activities for students to help them work on their base ten counting.