Exercise 1.1
Exercise 1.1, Solution 1:
i.
5,249,346
Expanded form: 5,000,000 + 200,000 + 40,000 + 9,000 + 300 + 40 + 6
Word form: Five million, two hundred forty-nine thousand, three hundred forty-six.
ii.
95,275,385
Expanded form: 90,000,000 + 5,000,000 + 200,000 + 70,000 + 5,000 + 300 + 80 + 5
Word form: Ninety-five million, two hundred seventy-five thousand, three hundred eighty-
five.
iii.
1,146,045,787
Expanded form: 1,000,000,000 + 100,000,000 + 40,000,000 + 6,000,000 + 40,000 + 5,000 +
700 + 80 + 7
Word form: One billion, one hundred forty-six million, forty-five thousand, seven hundred
eighty-seven.
iv.
297.50
Expanded form: 200 + 90 + 7 + 0.50
Word form: Two hundred ninety-seven point five zero.
Exercise 1.1, Solution 3:
a.
Sixty-five thousand, two hundred forty-four point three four
Standard form: 65,244.34
b.
Twelve million, four hundred fifty-two thousand, eight hundred thirty-two
Standard form: 12,452,832
c.
One-eighth of a million
Standard form: One-eighth of a million is × 1,000,000 = 125,000
d.
Half of a billion
Standard form: × 1,000,000,000 = 500,000,000
Exercise 1.1, Solution 5:
a.
Eighty-nine million, six hundred thirteen thousand, five hundred twenty-two, point one three
Standard form: 89,613,522.13
b.
Sixteen million, two hundred seventeen thousand, five hundred sixty-seven
Standard form: 16,217,567
c.
Half of a million
Standard form: Half of a million is
× 1,000,000 = 500,000
d.
Three-quarters of a trillion
Standard form: Three-quarters of a trillion is
× 1,000,000,000,000 = 750,000,000,000