tony96 tony96
  • 09-12-2015
  • Mathematics
contestada

use benchmarks to estimate 12.54 +7.98

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wmd1999
wmd1999 wmd1999
  • 09-12-2015
if you round both answers to the nearest whole number, you get about 21. You could also round to the nearest tenth, which means you would get 20.5, but you most likely are supposed to use the nearest whole number as a benchmark which would be 13+8=21
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misssmartypants15
misssmartypants15 misssmartypants15
  • 09-12-2015
12.54=13, 7.98=8, so 13+8=21 and 12.54+7.98=20.52 so 21 is the answer
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