5.NBT.B.6

The Divisor

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Game Info for Teachers

COMBINED RATING

4.0 Stars

TEACHERS (105)

4.2

STUDENTS (19154)

3.8

LENGTH

13 Minutes

GRADES

CAPABILITIES

Spanish Language Support

Text-to-Speech Support

Description

You are called in to stop a Monster from swallowing up all of the small numbers in Mathmagica!

Vocabulary Words

division

divisor

dividend

quotient

Instructions

Play through this interactive game to learn about Use Division with Base 10 Numbers. Suitable for Grade 3, Grade 4, Grade 5.

Main Concepts

Decompose the dividend into base-ten units and find the quotient place by place, starting from the highest place.

Explain multiplication of a whole number up to four digits by a one-digit whole number and of two two-digit numbers by using equations, rectangular arrays, and/or area models.

Estimate quotients and adjust when necessary to be exact (2500 / 28 = ? 28 can be rounded to 30 to get an estimate of how many times 28 goes into 250. Rounding to 30 will give an underestimate so that long division can continue. Using 30 as an estimate 28 will go into 2500 eight times. 28 x 8 = 224 which is an accurate estimate. Subtraction of 250-224 will yield 26. The Ones place can then be added to have a dividend of 260 where estimation can be used again to repeat the process).

Understand that algorithms for multiplication and division are abbreviations for reasoning about quantities.

745 ÷ 15 = ? interpreted as Divide 7 hundreds, 4 tens, 5 ones equally among 15 groups, starting with hundreds using the reasoning of the distributive property.

Discussion Questions

Before the Game

In this game you will be fighting monsters with division - how can we use estimation to help determine how many times a divisor can go into a dividend? When given a multi-digit divisor, how can you estimate the quotient?

After the Game

What happened in the game if you "split" the monster to solve the problem and how did this help you? Why is it necessary to use multiplication when solving a division problem?