`(-12)\xx\ (-9)-6\ xx\ (-8)` is equal to:
(a) 156
(b) 60
(c) `-156\ `
(d) `-60`

(-2)\xx\ (-3)\xx\ 6\ xx\ (-1) is equal to (a)36 (b) -36 (c) 6 (d) -6

75 \xx\ 75+2 \xx\ 75 \xx\ 25+25 \xx\ 25 is equal to=? (a)10000 (b) 6250 (c) 7500 (d) 3750

4 a 2 b 3 x 3a b 2 x 5 a 3 b is equal to: (a) 60 a 3 b 5 (b) 60 a 6 b 5 (c) 60 a 6 b 6 (d) a 6 b 5

(2tan30^@)/(1-tan^2 30^@) is equal to (a) cos60^@ (b) sin60^@ (c) tan60^@ (d) sin30^@

Find each of the following products: (a) 3 xx (-1) (b) (-1) xx 225 (c) (-21) xx (-30) (d) (-316) xx (-1) (e) (-15 xx 0 xx (-18) (f) (-12) xx (-11) xx (10) (g) 9 xx (-3) xx (-6) (h) (-18) xx (-5) xx (-4) (i) (-1) xx (-2) xx (-3) xx 4 (j) (-3) xx (-6) xx (-2) xx (-1)

9xx(-1/3)xx(-3)xx(-1/9)= (a) 1 (b) -1 (c) -3 (d) 3

Express as cm using decimals. (a) 5 mm (b) 60 mm (c) 164 mm (d) 9 cm 8 mm (e) 93 mm

Express as cm using decimals. (a) 5 mm (b) 60 mm (c) 164 mm (d) 9 cm 8 mm (e) 93 mm

If (45)/(60) is equivalent to 3/x , then the value of x is (a) 3 (b) 6 (c) 4 (d) 9

Simplify: (i) 5/12 xx (-36) , (ii) -17/18 xx 12 , (iii) -5/6 xx 6/5 , (iv) -14 xx 9/28 , (v) -12/5 xx (-15) , (vi) -3/4 by 8/7 , (v) -16/9 by 12/-5 , (vi) 35/(-8) by 12/(-5) (vii) -3/10 by -40/9 , (viii) -32/5 by 15/(-16) , (ix) -8/15 by -25/32