Chapter 14: Divide by 1-Digit Divisors

Lesson 1: Estimate Quotients. Objective: To use compatible numbers to estimate quotients.

Lesson 2: Place the First Digit. Objective: To use place value to place the first digit in a quotient and to decide what each digit should be.

Lesson 3: Divide 3-Digit Numbers. Objective: To divide 3-digit numbers by a 1-digit number.

Lesson 4: Zeros in Division. Objective: To divide when a zero is in the dividend or in the quotient.

Lesson 5: Choose a Method. Objective: To choose mental math, paper and pencil, or a calculator to divide greater numbers by a 1-digit number.

Lesson 6: Problem Solving Strategy: Interpret the Remainder. Objective: To decide how to interpret the remainder in a division problem.

Vocabulary: estimate, compatible numbers, division, quotient, remainder

**estimate:** to find an answer that is close to an exact answer

**compatible numbers:** numbers that are easy to compute mentally

**division: **the process of sharing a number of items to find how many groups can be made or how many items will be in a group

**quotient:** the number, including the remainder, that results from dividing

**remainder: **the amount left over after you find a quotient

Rounding Help:

**Rounding Rap**

Mark the place. Look to the right. 4 or less are out of sight. 5 and up will buy one more before they too are out the door. In those empty right-hand spaces, zeros keep the proper places.

Estimating and rounding:

http://www.math.com/school/subject1/lessons/S1U1L3GL.html

Rounding Whole Numbers: http://www.basic-mathematics.com/rounding-whole-numbers.html

Our textbook website: www.harcourtschool.com

Some good practice websites:

http://www.gamequarium.com/placevalue.html

http://www.softschools.com/math/games/

www.multiplication.com

www.funbrain.com