Evaluate:
854.563-7.7
Here, one decimal is not like decimal. So, first making it like decimal.
7.7 will be 7.700.
Now subtracting them.
854.563-7.700846.863
Hence, the correct answer is 846.863.
Use the product (a + b)(a - b) = a2−b2 to evaluate :
(i) 21×19
(ii) 33×27
(iii) 103×97
(iv) 9.8×10.2
(v) 7.7×8.3
(vi) 4.6×5.4