Question

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4.
\

$$\begin{array}{r} 518 \\\\ \\times 126 \\\\ \\hline \\end{array}$$

5.
\

$$\begin{array}{r} 618 \\\\ \\times 447 \\\\ \\hline \\end{array}$$

6.
\

$$\begin{array}{r} 374 \\\\ \\times 312 \\\\ \\hline \\end{array}$$

7.
\

$$\begin{array}{r} 3,218 \\\\ \\times 446 \\\\ \\hline \\end{array}$$

8.
\

$$\begin{array}{r} 1,898 \\\\ \\times 197 \\\\ \\hline \\end{array}$$

9.
\

$$\begin{array}{r} 2,165 \\\\ \\times 342 \\\\ \\hline \\end{array}$$

Explanation:

Problem 4: Multiply 518 by 126

Step1: Multiply 518 by 6

$518 \times 6 = 3108$

Step2: Multiply 518 by 20

$518 \times 20 = 10360$

Step3: Multiply 518 by 100

$518 \times 100 = 51800$

Step4: Sum the three products

$3108 + 10360 + 51800 = 65268$

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Problem 5: Multiply 618 by 447

Step1: Multiply 618 by 7

$618 \times 7 = 4326$

Step2: Multiply 618 by 40

$618 \times 40 = 24720$

Step3: Multiply 618 by 400

$618 \times 400 = 247200$

Step4: Sum the three products

$4326 + 24720 + 247200 = 276246$

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Problem 6: Multiply 374 by 312

Step1: Multiply 374 by 2

$374 \times 2 = 748$

Step2: Multiply 374 by 10

$374 \times 10 = 3740$

Step3: Multiply 374 by 300

$374 \times 300 = 112200$

Step4: Sum the three products

$748 + 3740 + 112200 = 116688$

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Problem 7: Multiply 3218 by 446

Step1: Multiply 3218 by 6

$3218 \times 6 = 19308$

Step2: Multiply 3218 by 40

$3218 \times 40 = 128720$

Step3: Multiply 3218 by 400

$3218 \times 400 = 1287200$

Step4: Sum the three products

$19308 + 128720 + 1287200 = 1435228$

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Problem 8: Multiply 1898 by 197

Step1: Multiply 1898 by 7

$1898 \times 7 = 13286$

Step2: Multiply 1898 by 90

$1898 \times 90 = 170820$

Step3: Multiply 1898 by 100

$1898 \times 100 = 189800$

Step4: Sum the three products

$13286 + 170820 + 189800 = 373906$

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Problem 9: Multiply 2165 by 342

Step1: Multiply 2165 by 2

$2165 \times 2 = 4330$

Step2: Multiply 2165 by 40

$2165 \times 40 = 86600$

Step3: Multiply 2165 by 300

$2165 \times 300 = 649500$

Step4: Sum the three products

$4330 + 86600 + 649500 = 740430$

Answer:

1. $65268$
2. $276246$
3. $116688$
4. $1435228$
5. $373906$
6. $740430$