Question

find the associative property 9 upon 3 into 13 upon 20 into 85 upon 12​

Answer 1

Answer:

9/3 × 13/20 × 85/12 = 221/16

Step-by-step explanation:

9/3 × 13/20 × 85/12

By associative property:

a×(b×c) = (a×b)×c

a = 9/3

b = 13/20

c = 85/12

9/3( 13/20 × 85/12) = (9/3 × 13/20) 85/12

9/3[ (13 × 3 / 20 × 3) × (85 × 5 / 12 ×5)] = [(9 × 20 / 3 × 20) × (13 × 3 / 20 × 3)]85/12

9/3(39/60 × 425/60) = (180/60 × 39/60)85/12

9/3 × 1105/240 = 39/20 × 85/12

1989/144 = 221/16

221/16 = 221/16

L.H.S = R.H.S

Hence, verified.

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