without actual multiplication find 28^3-78^3
Answers
Step-by-step explanation:
Section:A I. Question number I to 6 carries one mark each rite the general form of associative property under addition. 2. Sum of interior angles in a quadrilateral is. 3. Find the mean of first five odd numbers. 4. Square of any odd number is always. 5. Write the formula to find compound interest. 6. Ify+3-10 find y Section :lB I. Question number 7 to 12 carries one mark each. 7. Write any two properties of square. 8. Find the median of first ten even numbers 9. Verify Euler's formula for cube. 10.Draw cuboids and mention top view, front view and side view. 11.Explain distributive property under multiplication over addition with an example. 12.The perimeter of a rectangle is 13cm and its width is 23 cm. find the length. Section :C Question number 13 to 22 carries one mark each. 13.Find the square of 38 without actual multiplication 14.State and prove angle sum property of quadrilateral 15.The perimeter of a parallelogram ABCD, whose adjacent side measures 7em III. and 13cm. 16.Find any three rational numbers between and 17.The sum of three consecutive multiple of 11 is 363.find the multiples. 18·Solve 2yt3-3片 19.Make a grouped frequency distribution to the following. 26 丘20, 15. 12,4635,28, 30, f7,g,9, to, 14,h%2,42,43,3 ,H ,27, ts,16,ly,29,38,49,4 7,43,41,31
Answer:
01×99=(100+1)(100−1)
We know suitable identity is (x+y)(x−y)=x2−y2
Therefore, the value of (100+1)(100−1) is
=(100)2−(1)2
=10000−1
=9999
Step-by-step explanation:
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