6.NS.B.3

Decimal Demolition

Experience Awakening - Our open-world educational game

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Game Info for Teachers

COMBINED RATING

3.9 Stars

TEACHERS (42)

3.9

STUDENTS (7975)

3.9

LENGTH

17 Minutes

GRADES

CAPABILITIES

iPad Support

Spanish Language Support

Text-to-Speech Support

Description

Learn how to fluently add, subtract, multiply and divide with decimals while taking care of a demolition job! Get that wrecking ball out and ready to go!

Vocabulary Words

addition

subtraction

multiplication

division

decimal

whole number

tenths

hundredths

thousandths

sum

quotient

product

Instructions

Play through this interactive game to learn about Arithmetic with Decimals. Suitable for Grade 6, Grade 7, Grade 8.

Main Concepts

Use place value knowledge when multiplying decimals (A tenth by a tenth will yield a product of a hundredth).

The process of composing and decomposing a base-ten unit is the same for decimals as for whole numbers and the same methods of recording numerical work can be used with decimals as with whole numbers.

General methods used for computing quotients of whole numbers extend to decimals with the additional issue of placing the decimal point in the quotient.

Use the same place value understanding for adding and subtracting decimals used for adding and subtracting whole numbers.

General methods used for computing products of whole numbers extend to products of decimals.

Use a standard algorithm to divide multi-digit decimals: 4-digit divided by 2-digit or 3-digit divided by 3-digit.

A whole number is not usually written with a decimal point, but a decimal point followed by one or more 0s can be inserted on the right (e.g., 16 can also be written as 16.0 or 16.00). This reasoning can be used to put 0s in places so that all numbers show the same number of places to the right of the decimal point.

When multiplying the decimal place values can be added and then added to the product (32.4 x 16.8 can be multiplied as 324 x 168 and then move the decimal the 2 place values left in the product).

Use a standard algorithm to multiply multi-digit decimals: 1-digit x 2-digit, 1-digit x 3- digit, 2 digit x 3-digit, 2-digit x 4-digit, or 2-digit x 5-digit.

Use a standard algorithm to add multi-digit decimals.

Use a standard algorithm to subtract multi-digit decimals.

Discussion Questions

Before the Game

What kinds of numbers do decimals represent? How can we represent a whole number as a decimal? What is the relationship between decimals and fractions? What are the first three place values to the right of the decimal? How do you multiply numbers that contain decimals? How do you divide numbers that contain decimals?

After the Game

What is the rule for adding decimal numbers? When was it necessary to add zeros to complete the problem? What is the rule for multiplying decimals? What is the rule for dividing decimals? What is 3.1 x .7? What is .96/4?