Find the value of: (i) `1487xx327+(-487)xx327` (ii) `28945xx99-(-28945)`

Find the value of hat i xx hat j

Find the value of ( 8!)/( 6! Xx2i)

Find the value of (-2) xx (-3) xx (4) xx (-7).

Find the value of (-20)xx(-2)xx(-5)xx7

Find the value of: (i) 3. 45xx10 (ii) 0. 25xx10000

Find the value of: (i) 1000xx5. 29 (ii) 10000xx0. 01

Use convenient groupings and find the values of (i) 18 xx (-27) xx 30 (ii) (-8) xx (-63) xx 9 (iii) (-17) xx (-23) xx 41 " " (iv) (-51) xx (-47) xx (-19)

Find the value of the following 4xx25xx79xx10