##### 1.2 BASIC MULTIPLICATION (WHOLE NUMBERS)

College: First year, College: Second year, College: Third year, College: Fourth year

VOCABULARY:

THE ANSWER TO A MULTIPLICATION PROBLEM IS CALLED?

PRODUCT

BASIC MULTIPLICATION (WHOLE NUMBERS):

EXAMPLE: 23 X 5 =

STEPS:

1. MULTIPLY ONE DIGIT AT A TIME.

2. MULTIPLY 5 X 23:

*ONES: 5 X 3 = 15

**CARRY THE 1 TO THE TENS PLACE, AND WRITE THE 5 IN THE ONES PLACE.

*TENS: 5 X 2 = 10 + 1 = 11

ANSWER: 115

BASIC MULTIPLICATION (WHOLE NUMBERS):

EXAMPLE: 623 X 45 =

STEPS:

1. MULTIPLY 623 X 5.

*5 X 3 = 15

*5 X 2 = 10 + 1(CARRIED OVER) = 11

*5 X 6 = 30 + 1(CARRIED OVER) = 31(NO NEED TO CARRY OVER)

2. MULTIPLY 623 X 4(REMEMBER TO LINE UP THE ONES DIGIT WITHT HE 4 BY USING ZERO AS A PLACEHOLDER)

*4 X 3 = 12

*4 X 2 = 8 + 1 = 9

*4 X 6 = 24

3. ADD THE TWO PRODUCTS TOGETHER.

* 115 + 24,920 = 28,035(THE FINAL PRODUCT)

BASIC MULTIPLICATION (WHOLE NUMBERS):

EXAMPLE: 301 X 451 =

STEPS:

1. MULTIPLY 301 X 1.

*1 X 1 = 1

*1 X 0 = 0

*1 X 3 = 3

2. MULTIPLY 301 X 5.

*5 X 1 = 5(REMEMBER TO USE A ZERO FOR A PLACEHOLDER)

*5 X 0 = 0

*5 X 3 = 15

3. MULTIPLY 301 X 4.

*4 X 1 = 4

*4 X 0 = 0

*4 X 3 = 12

4. ADD THE THREE PRODUCTS TOGETHER.

*301 + 15,050 + 120,400 = 135,751 (THE FINAL PRODUCT)

PRACTICE:

846 X 7 =

5,922

PRACTICE:

325 X 6 =

1,950

PRACTICE:

653 X 12 =

7,836

PRACTICE:

806 X 55 =

44,330

PRACTICE:

795 X 14 =

11,130

PRACTICE:

999 X 22 =

21,978

PRACTICE:

582 X 325 =

189,150

PRACTICE:

9438 X 165 =

1,557,270

PRACTICE:

JAN IS PREPARING AN EXAMINATION FOR 29 STUDENTS. EACH STUDENT WILL HAVE 30 QUESIONS, WITH NO STUDENT HAVING DUPLICATE QUESTIONS. HOW MANY QUESTIONS WILL JAN NEED TO PREPARE?

870

PRACTICE:

JOHN IS ORDERING LUNCH FOR THE VOLUNTEERS AT THE HOSPITAL. THERE ARE 12 UNITS IN THE HOSPITAL, WITH 15 VOLUNTEERS IN EACH UNIT. HOW MANY LUNCHES WILL JOHN NEED TO ORDER?

180