Page 162 - New Medley 4 Semester 1

Property 3: 282315 × 0 = 0 0 × 282315 = 0

The product of a number and zero (0) is zero (0)

Let A be any number. Then

A × 0 = 0. Also 0 × A = 0

Property 4: [129 × 134] × 105 129 × [134 × 105]

= 17286 × 105 = 129 × 14070

= 1815030 = 1815030

We get the same product in both cases.

The product of three numbers is the same even if the
grouping of the multiplying numbers is changed.

Let A, B and C be the three numbers then

(A × B) × C = A × (B × C)

EXERCISE 3.8

Fill in the blanks.

1. 431226 × 1 =

2. 734752 × = 734752

3. × 1 = 652343

4. 153030 × 129079 = × 153030

5. 144503 × = 729281 × 144503

6. 821781 × 0 =

7. 915062 × = 0

8. (425211 × 235326) × 485231 = 425211 × ( × )

9. (421321 × 234932) × 645083 = × ( × 645083)

10. ( × ) × 451156 = 170345 × (200521 × 451156)

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