Anonymous
Anonymous asked in Science & MathematicsChemistry · 8 months ago

# 54.00+78= _______ give the answer to the correct number of significant figures?

chemistry problem

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• Dr W
Lv 7
8 months ago

in mult/div, the answer is limited to the same # of sig figs as the factor with the least # of sig figs

in add/sub, the answer is limited to the same precision as the addend with the lowest precision

********

this problem is addition, so we go by precision

.. 54.00 is precise to the 0.01's column

.. 78 is precise to the 1's column

so

.. the answer is reported to the 1's column

so

.. 54.00 + 78 = 132 (with 3 sig figs, precise to the 1's column)

• Pearl
Lv 7
8 months ago

i think its 132

• Anonymous
8 months ago

Trick question - it's 148 due to the two decimal places.

• 8 months ago

132 because 78 is correct in the units place.

If your teacher says round off to 130, I say he/she is RONG

• 8 months ago

132. When adding/subtracting sig figs you go with the fewest decimal places.