MULTIPLICATION OF NUMBERS

MULTIPLICATION OF NUMBERS BY 2-DIGIT NUMBERS

Example 1 multiply 25 by 12

Method 1: column form                                                  method 2: Expanded form

2    5                                                                25 x 12 = 25 x (10 = 2)

x  1    2                                                                              = (25 x 10) = (25 x 2)

2   5   0                  (25 x 10)                                          = 250 + 50

+   5   0                  (25 x 2)                                           = 300

3   0   0

 

EXERCIES 1: Multiply the following

1. 53 x  50                                                     84  x  10
2. 97 x  10                                                     96  x 40
3. 67 x  50                                                     67  x  50
4. 87 x  20                                                    64  x  30
5. 57 x  40                                                    64  x  40
6. 56 x  10                                                    95  x  20
7. 86 x  20                                                    84  x  50
8. 99 x  50                                                 75  x  10
9. 89 x  30
10. 75 x  40

 

EXERCISE 2: multiply the following

1. 89  x 46
2. 45  x  37
3. 56  x  17
4. 88  x  32
5. 36  x  35
6. 78  x  18
7. 76  x  26
8. 29  x  27
9. 79  x  49
10. 75  x  46

 

See also

Area

Length

Rates

Algebraic

SQUARE AND SQUARE ROOTS