4.2A & 4.2B

The digit 9 has a value of (9 × 100).

The digit 4 has a value of (4 × 100).

The digit 8 has a value of (8 × 0.1).

The digit 2 has a value of (2 × 10).

100,000,000 + 40,000,000 + 5,000,000 + 700,000 + 80,000

100,000,000 + 40,000,000 + 500,000 + 70,000 + 8,000

10,000,000 + 4,000,000 + 500,000 + 70,000 + 8,000

100,000,000 + 40,000,000 + 500 + 70 + 8

100,000,000 + 40,000,000 + 5,000,000 + 700,000 + 80,000

100,000,000 + 40,000,000 + 500,000 + 70,000 + 8,000

10,000,000 + 4,000,000 + 500,000 + 70,000 + 8,000

100,000,000 + 40,000,000 + 500 + 70 + 8

One million, thirty-nine thousand, two thousand, nine hundred thirty-one

One million, three hundred ninety-two thousand, nine hundred thirty-one

One million, three hundred nine thousand, nine hundred thirteen

Thirteen million, ninety-two thousand, nine hundred thirty-one

(5 x 10) + (1 x 0.01) + (8 x 0.1)

(5 x 10) + (1 x 0.1) + (8 x 0.01)

(5 x 10) + (1 x 10) + (8 x 100)

(5 x 1000) + (1 x 10) + (8 x 1)

400

40

4

Not here