[" (i) "7times109],[" (ii) "102times103],[" (iii) "17times109]

Evaluate the following : (i) 2/5 times 3/7" (ii) " 3/5 times 8/9" (iii) " 7 times 1""2/3 .

.Using identities (a) "102times103

(-8)times9+(-8)times7],[" (iii) "20times(-16)+20times14 , (-11)times(-15)+(-11)times(-25)

Express the following in exponential form: (i) "6 times 6times6 times 6 (ii) t times t (iii) b times b times b times b times b times b (iv) 5 times 5times7 times 7times7 (v) "2 times 2times a times a (vi) a times a times a times c times c times c times c times d times 1

1.Find the value of : (i) "120-20-:2 (ii) 28-5times6+2 (iii) 27+20-:5 (iv) 17+(-3)times(-5)-6 (v) 17+(-48)times(-16)+(-2)times6 (vi) 5+(10-5)

Evaluate each of the following by using identities: (i) 103\ xx\ 97 (ii) 103\ xx\ 103 (iii) (97)^2

Verify: (-17) times 21=17 times (-21)

Evaluate : ( i )   c times c times c times ----- 5 ( ii )   7 times 7 times 7

Simplify: 17 xx 109