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4- MULTIPLICATION
Ms. Bhakti Joshi
What is Multiplication?
INTRO
1-Add the flowers within the groups
(5 + 5 + 5)
2-or we can multiply the number of groups by the number of flowers in one group
(3 groups x 5 flowers)
3- 5 + 5 + 5 has the same meaning as 3 x 5
(3 groups of 5)
Multiplying means repeated addition of a number.
Properties
of
Multiplication
properties
1
1. The product of a number and 1 is the number itself.
400 × 1 = 400
599 × 1 = 599
1
1
1. The product of a number and 1 is the number itself.
1
2
2
2. The product of a number and 0 is always 0 (zero).
199 × 0 = 0
100 × 0 = 0
2
2. The product of a number and 0 is always 0 (zero).
2
3
3. The product two numbers does not change even if we change the order of the numbers.
200 × 2 = 400
Or 2 × 200 = 400
3
3
3. The product two numbers does not change even if we change the order of the numbers.
3
4
4. The product of the numbers does not change even if we change the groupings.
(12×7)×5=84×5=420
or 12×(7×5)=12×35=420
4
4
4. The product of the numbers does not change even if we change the groupings.
4
5
5. Distributive property of multiplication over addition.
2×(6+3)=(2×6)+(2×3)
2×9=12+6
18=18
5
5. Distributive property of multiplication over addition.
5
5
Multiplication
by 100,200,300,--900
and by
1000,2000,3000,--9000
PROGRAMS
HOMEWORK
HOMEWORK
Solve Exercise 4(A) neatly in the classwork notebook.