Express the answers to the following calculations in SI units
and appropriate significant figures. Note: One result will have no
units. Hint: To help you see significant figures for the addition
and subtraction, express all given data in meters and do not use
scientific notation. 1.0 m + 1 mm 1.0 m × 1 mm 1.0 m – 999 mm
1.0 m ÷ 999 mm