2 Calculate: 13 × 312

Question

ScanSolve AI Tutor · Accepted Answer

Okay, Sindura, let's tackle Question 3.4, which asks us to calculate without a calculator and show all steps.

Align the decimal points and subtract the numbers column by column, starting from the rightmost digit.
$\begin{array}{c} \phantom{0.}531 \\ - \phantom{0.}421 \\ \hline \end{array}$
Perform the subtraction.
$\begin{array}{c} \phantom{0.}531 \\ - \phantom{0.}421 \\ \hline \phantom{0.}110 \\ \end{array}$
The result is $\boxed{0.110}$ .

3.4.2: $2,301 + 36,4$

Assuming 36,4 means 36.4 (standard decimal notation).
Align the decimal points.
2,301 can be written as 2301.0.
$\begin{array}{c} \phantom{0}2301.0 \\ + \phantom{00}36.4 \\ \hline \end{array}$
Perform the addition column by column, starting from the rightmost digit.
$\begin{array}{c} \phantom{0}2301.0 \\ + \phantom{00}36.4 \\ \hline \phantom{0}2337.4 \\ \end{array}$
The result is $\boxed{2337.4}$ .

2 Calculate: 13 * 312