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Anonymous Anonymous
  • 01-09-2015
  • Mathematics
Answered

Explain why or why not 12.702 is a reasonable value for the expression 5.8 ×2.19

Verified Answer :

Anonymous Anonymous
  • 01-09-2015

5.8 x 2.19

= (5.00 + 0.80) x (2.00 + 0.19)

= 5.002.00 + 5.000.19 + 0.802.00 + 0.800.19

= 10.00 + 0.95 + 1.60 + 8/10 19/100

= 10.00 + 0.95 + 1.60 + (8(10+9))/1000

= 10.00 + 0.95 + 1.60 + (80+72)/1000

= 10.00 + 0.95 + 1.60 + 152/1000

= 10.000 + 0.950 + 1.600 + 0.152

= 11.600 + 0.950 + 0.152

= 12.550 + 0.152

= 12.702

It actually is a reasonable value.

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