Question
If $L = 2.331\, cm$, $B = 2.1\, cm$, then $L + B =$
✓
Answer
Step 1 $L=2.331 \mathrm{cm}=2.33$ (corrected to two decimal places) and $B=2.1 \mathrm{cm}$
Step 2 $L+B=2.33+2.1=4.43 \mathrm{cm} .=4.4 \mathrm{cm}$
(by the rule of addition the sum is expressed in minimum decimal places of terms in addition).
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