Use Distributive Law to Evaluate : 385 X 1004

Use distributive law to evaluate :
385 x 1004

Sum

385 x 1004
= 385 x (1000 + 4)
= 385 x 1000 x 385 x 4
= 385000 + 1540 = 386540

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Chapter 5 Natural Numbers and Whole Numbers (Including Patterns)
Exercise 5 (C) | Q 3.2

By re-arranging the given numbers evaluate :
21 + 22 + 23 + 24 + 25 + 75 + 76 + 77 + 78 + 79

Fill in the blank :
592 x 1 = _____

Fill in the blank :
229 x ________ = 578 x 229

Fill in the blank :
32 x 15 = 32 x 6 + 32 x 7 + 32 x ______

Use distributive law to evaluate :
446 x 10002

Evaluate using properties :
8324 x 1945 – 8324 x 945

In each of the following patterns, construct next figure.
In each case, if n denotes the number of figure and F denotes the number of matchsticks used, find F in terms of n.
Also find, in each case, how many matches are required to make the: 16th figure and 30th figure.