Mathematics · Foundation

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Decimal additionRunning
Number line. Powder added at 0.1 g. Mass on the pan 1.45 g, Prescribed mass 2 g. Currently mass on the pan is short by 0.554 g.TUNING-50-40-30-20-10010203040500.1 G1.45 g
t = 0.0s

Mass on the pan

1.45g

Prescribed mass

2g

0.1 g

Number line. Powder added at 0.1 g. Mass on the pan 1.45 g, Prescribed mass 2 g. Currently mass on the pan is short by 0.554 g.

What has to balance1.35+x=2.001.35 + x = 2.00

What is happening

You arrive at a chemist weighing out a prescription on a digital balance.

The pan reads 1.35 g and the prescription calls for exactly 2 g. Adding by eye keeps overshooting the second decimal place.