Category : 3rd Class
LEARNING OBJECTIVES
This lesson will help us to:
REAL LIFE EXAMPLES
QUICK CONCEPT REVIEW
Multiplication is repeated addition. The number to be multiplied is the multiplicand, the number we are multiplying with is the multiplier and the result is called the product of multiplication.
Examples
1. This is a flower. It has 8 petals. How many petals are there in 5 such flowers?
8+8+8+8+8= 40, or 5 times 8 = 40,
Or 5 x 8 = 40
2. This is an ant. It has 6 legs. How many legs do 7 ants have altogether?
6+6+6+6+6+6+6= 42, or 7 times 6 = 42.
Or 7 X 6 = 42
3. This is a tray with Ladoos (sweet). It has 9 Ladoos. How many Ladoos are there in 6 trays?
9+9+9+9+9+9=54, Or 6 times 9 = 54,
or 6 X 9 = 54
MULTIPLICATION TREE
10 \[\Rightarrow \]1X 10 =2X5=5X2
35 \[\Rightarrow \]1X 35 =5X7=7X5
24 \[\Rightarrow \]1X24=2X12=3X8
=4X6
18 \[\Rightarrow \]1X 18=2X9=3X6
=9X2
36 \[\Rightarrow \]1 X 36 = 2 X 18 = 3 X 12
=4X9=6X6
32\[\Rightarrow \]1X32=2X16=4X8
= 8 X 4 = 16 X 2
THINGS THAT COME IN GROUPS
2s |
Hands, shoulders, book covers, earrings, socks, shoes, glasses lens, eyes. |
3s |
Tricycle wheels, clock hands, hands of a fan, colors in Indian Flag, traffic lights. |
4s |
Dog legs, chair legs, table legs, baseball bases, seasons in India. |
5s |
Basket ball team. Fingers per hand, points of a star, ocean, vowels. |
6s |
Guitar strings, half a dozen eggs. Legs of insects. Sides of a die. |
7s |
Days in a week, dwarves in snow white, rainbow colors, continents, seas, wonders of the world. |
8s |
Legs of spider, octopus legs, planets, basic colors. |
9s |
Tic-tac-toe boxes, baseball innings. |
10s |
Rs 10 in Rs 100, fingers per person, years in a decade, toe fingers per person, digits in mobile number. |
Amazing Facts
145 X 1 = 145
326 X 0 = 0 or 0 X 242 = 0
120 X 2 = 240 or 2 X 120 = 240
HISTORICAL PREVIEW
MULTIPLICATION CHART
x |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
2 |
0 |
2 |
4 |
6 |
8 |
10 |
12 |
14 |
16 |
18 |
20 |
3 |
0 |
3 |
6 |
9 |
12 |
15 |
18 |
21 |
24 |
27 |
30 |
4 |
0 |
4 |
8 |
12 |
16 |
20 |
24 |
28 |
32 |
36 |
40 |
5 |
0 |
5 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
6 |
0 |
6 |
12 |
18 |
24 |
30 |
36 |
42 |
48 |
54 |
60 |
7 |
0 |
7 |
14 |
21 |
28 |
35 |
42 |
49 |
56 |
63 |
70 |
8 |
0 |
8 |
16 |
24 |
32 |
40 |
48 |
56 |
64 |
72 |
80 |
9 |
0 |
9 |
18 |
27 |
36 |
45 |
54 |
63 |
72 |
81 |
90 |
10 |
0 |
10 |
20 |
30 |
40 |
50 |
60 |
70 |
80 |
90 |
100 |
SHORTCUT TO PROBLEM SOLVING
Step1: Step 2:
9 X 1 = 9 9 X 1 = 9
9 X 2 = 1 9 X 2 = 18
9 X 3 = 2 9 X 3 = 27
9 X 4 = 3 9 X 4 = 36
9 X 5 = 4 9 X 5 = 45
9 X 6 = 5 9 X 6 = 54
9 X 7 = 6 9 X 7 = 63
9 X 8 = 7 9 X 8 = 72
9 X 9 = 8 9 X 9 = 81
9 X 10 = 9 9 X 10 = 90
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