`(4. 2xx4. 2-1. 9xx1. 9)/(2. 3xx6. 1)=?` (a) 0.5 (b) 1 (c) 1.9 (d) 4.2

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

Solve 48. 2xx2. 5xx2. 2+?=270 (a) 6.5 (b) 2.8 (c) 4.9 (d) 3.4 (e) 1.2

(5xx1.6-2xx1.4)/(1.4(d)4^(1.3))=?( a) 0.4(b)1.2 (c)

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

The simplest value of (1)/(1xx2)+(1)/(2xx3)+(1)/(3xx4)+backslash+(1)/(9xx10) is (1)/(10) (b) (9)/(10) (c) 1 (d) 10

The value of (5 (1)/(9) - 7 (7)/(8)div9 (9)/(20)) xx (9)/(11)- (5(1)/(4) div (3)/(7) " of " (1)/(4) xx (2)/(7)) div 4 (2)/(3) + 1 (3)/(4) is (a) 2(1)/(4) (b) 2(1)/(3) (c) 3(1)/(4) (d) 4(1)/(2)

Solve 2.5xx4.8+7.2xx1.5-1.2xx14=? (a) 1.2(b)6.5(c)4(d)4.8(e)6

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)

Find -2 1/9 xx 3/4