State which is greater: (i) `(8+9)xx10\ and\ 8+9xx10` (ii) `(8-9)xx10\ and\ 8-9xx10` (iii) `{(-2)-5}xx(-6)` and `(-2)-5xx(-6)`

State which is greater: ( i ) (8+9)xx10backslash and backslash8+9xx10 (ii) (8-9)xx10backslash and backslash8-9xx10 (iii) {(-2)-5}xx(-6) and (-2)-5xx(-6)

Which is greater? (-8) xx (-5) or (-9) xx (-4)

Simplify : (i) (-8)/7xx(14)/5 (ii) (13)/6xx(-18)/(91) (iii) (-5)/9xx(72)/(-125) (iv) (-22)/9xx(-51)/(-88)

9.8 xx 10.2 =__

1/2xx 5/4 + 6/8 xx 10/9

Write the numeral whose expanded form is given below: ( i ) 6 xx 10^(4)+3 xx 10^(3)+0 xx 10^(2)+7 xx 10^(1)+8 xx 10^(0) ( ii ) 9 xx 10^(6)+7 xx 10^(5)+0 xx 10^(4)+3 xx 10^(3)+2 xx 10^(2)+9 xx 10^(1)+6 xx 10^(0) ( iii ) 8 xx 10^(5)+6 xx 10^(4)+4 xx 10^(3)+2 xx 10^(2)+9 xx 10^(1)+6 xx 10^(0)