Question

1. what is the value of the expression? $64.58 + 7.426 = __________$

Explanation:

Step1: Align decimal points

$$64.580 + 7.426$$

Step2: Add from rightmost digit

$$\begin{align*} &0+6=6\\ &8+2=10 \text{, carry 1}\\ &5+4+1=10 \text{, carry 1}\\ &4+7+1=12 \text{, carry 1}\\ &6+0+1=7 \end{align*}$$

Step3: Combine results

Place digits with decimal point: $72.006$

Answer:

$72.006$