Grade 5 SGO Math worksheet - Free Printable

The task involves solving a series of multiplication problems. Below, I will solve each problem step by step.

Problem 1: \( 14 \times 30 \)

\[
14 \times 30 = 14 \times (3 \times 10) = (14 \times 3) \times 10 = 42 \times 10 = 420
\]
Answer: \( 420 \)

Problem 2: \( 729 \times 67 \)

We use the standard multiplication method:
\[
\begin{array}{r}
729 \\
\times 67 \\
\hline
5103 \quad \text{(729 × 7)} \\
+ 43740 \quad \text{(729 × 60, shift one place to the left)} \\
\hline
48843 \\
\end{array}
\]
Answer: \( 48843 \)

Problem 3: \( 33 \times 72 \)

We use the standard multiplication method:
\[
\begin{array}{r}
33 \\
\times 72 \\
\hline
66 \quad \text{(33 × 2)} \\
+ 2310 \quad \text{(33 × 70, shift one place to the left)} \\
\hline
2376 \\
\end{array}
\]
Answer: \( 2376 \)

Problem 4: \( 12 \times 46 \)

We use the standard multiplication method:
\[
\begin{array}{r}
12 \\
\times 46 \\
\hline
72 \quad \text{(12 × 6)} \\
+ 480 \quad \text{(12 × 40, shift one place to the left)} \\
\hline
552 \\
\end{array}
\]
Answer: \( 552 \)

Problem 5: \( 818 \times 98 \)

We use the standard multiplication method:
\[
\begin{array}{r}
818 \\
\times 98 \\
\hline
6544 \quad \text{(818 × 8)} \\
+ 73620 \quad \text{(818 × 90, shift one place to the left)} \\
\hline
80164 \\
\end{array}
\]
Answer: \( 80164 \)

Problem 6: \( 952 \times 24 \)

We use the standard multiplication method:
\[
\begin{array}{r}
952 \\
\times 24 \\
\hline
3808 \quad \text{(952 × 4)} \\
+ 19040 \quad \text{(952 × 20, shift one place to the left)} \\
\hline
22848 \\
\end{array}
\]
Answer: \( 22848 \)

Problem 7: \( 715 \times 83 \)

We use the standard multiplication method:
\[
\begin{array}{r}
715 \\
\times 83 \\
\hline
2145 \quad \text{(715 × 3)} \\
+ 57200 \quad \text{(715 × 80, shift one place to the left)} \\
\hline
59345 \\
\end{array}
\]
Answer: \( 59345 \)

Problem 8: \( 68 \times 39 \)

We use the standard multiplication method:
\[
\begin{array}{r}
68 \\
\times 39 \\
\hline
612 \quad \text{(68 × 9)} \\
+ 2040 \quad \text{(68 × 30, shift one place to the left)} \\
\hline
2652 \\
\end{array}
\]
Answer: \( 2652 \)

Problem 9: \( 583 \times 30 \)

\[
583 \times 30 = 583 \times (3 \times 10) = (583 \times 3) \times 10 = 1749 \times 10 = 17490
\]
Answer: \( 17490 \)

Problem 10: \( 54 \times 31 \)

We use the standard multiplication method:
\[
\begin{array}{r}
54 \\
\times 31 \\
\hline
54 \quad \text{(54 × 1)} \\
+ 1620 \quad \text{(54 × 30, shift one place to the left)} \\
\hline
1674 \\
\end{array}
\]
Answer: \( 1674 \)

Problem 11: \( 18 \times 67 \)

We use the standard multiplication method:
\[
\begin{array}{r}
18 \\
\times 67 \\
\hline
126 \quad \text{(18 × 7)} \\
+ 1080 \quad \text{(18 × 60, shift one place to the left)} \\
\hline
1206 \\
\end{array}
\]
Answer: \( 1206 \)

Problem 12: \( 68 \times 18 \)

We use the standard multiplication method:
\[
\begin{array}{r}
68 \\
\times 18 \\
\hline
544 \quad \text{(68 × 8)} \\
+ 680 \quad \text{(68 × 10, shift one place to the left)} \\
\hline
1224 \\
\end{array}
\]
Answer: \( 1224 \)

Final Answers:

\[
\boxed{
\begin{array}{ccc}
420 & 48843 & 2376 \\
552 & 80164 & 22848 \\
59345 & 2652 & 17490 \\
1674 & 1206 & 1224 \\
\end{array}
}
\]