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Math
Write each number in standard form.
 1 100,000,000 + 30,000,000 + 4,000,000 + 200,000 + 7,000 + 300 + 40 + 3
 2 seven million, eight hundred thirty-seven thousand, three hundred forty-one
 3 5,000,000 + 200,000 + 30,000 + 2,000 + 400 + 80 + 2
 4 four hundred fifty-three million, seven hundred thirty-two thousand, two hundred ninety-nine
 5 5 ten millions 5 hundred thousands 1 thousand 8 hundreds 9 tens 2 ones
 6 400,000,000 + 80,000,000 + 4,000,000 + 900,000 + 80,000 + 8,000 + 400 + 3

Write each number in two other ways.
 7 7 millions 4 hundred thousands 9 ten thousands 6 thousands 6 tens 5 ones
 8 6,686,248
 9 700,000,000 + 20,000,000 + 3,000,000 + 800,000 + 30,000 + 1,000 + 100 + 70 + 6
 10 300,000,000 + 4,000,000 + 700,000 + 80,000 + 5,000 + 100 + 50 + 6

Write the place and the value of the underlined digit.
 11 4,825,164
 12 974,594,116
 13 44,455,871
 14 90,947,205
 15 47,326,049
 16 335,629,272
 17 7,089,172
 18 773,352,050

 Key #2
 aKey #2
Write the value of .
 19 80,000,000 + + 200,000 + 30,000 + 5,000 + 300 + 50 + 1 = 81,235,351
 20 3 millions hundred thousands 7 ten thousands 5 hundreds 2 tens 6 ones = 3,570,526
 21 20,000,000 + 6,000,000 + + 10,000 + 800 + 20 + 7 = 26,410,827
 22 + 600,000 + 2,000 + 700 + 20 + 2 = 5,602,722

Write each number in standard form.
 23 20,000,000 + 60,000 + 80 + 800 + 200,000,000 + 9 + 9,000,000 + 1,000
 24 5 millions 4 ten millions 4 hundreds 4 thousands 2 ten thousands 4 ones
 25 5,000,000 + 700 + 9 + 70,000
 26 five million, six hundred thirty-five thousand, four hundred six
 27 one hundred thirty-six million, ninety thousand, eighty-seven
 28 5 thousands 8 tens 5 hundreds 4 ten millions 6 hundred thousands 6 ten thousands 8 ones

Write the value of .
 29 4 millions 1 ten 9 ten thousands 3 ten millions 3 thousands ones = 34,093,017
 30 20,000,000 + 700,000 + 600,000,000 + 10 + 70,000 + 400 + 8 + = 620,779,418
 31 20,000 + 400 + + 7 + 6,000,000 + 90 + 8,000 = 6,928,497
 32 ones 1 thousand 1 ten million 8 hundred thousands 4 tens 7 ten thousands 9 hundreds 6 millions = 16,871,948

 Key #2
 aKey #2
Write each number in expanded form using exponents.
 33 395,944,213
 34 893,405,151
 35 1,905,161
 36 2,906,402
 37 283,554,077
 38 20,321,655
 39 5,607,040
 40 58,982,543

Write each number in standard form.
 41 (7 × 108) + (7 × 107) + (8 × 106) + (9 × 105) + (1 × 102) + (4 × 101) + (6 × 100)
 42 (4 × 1,000,000) + (3 × 100,000) + (8 × 10,000) + (4 × 1,000) + (6 × 10) + (3 × 1)
 43 6 ten millions 2 millions 1 hundred thousand 3 thousands 6 hundreds 4 tens 7 ones
 44 (7 × 108) + (1 × 107) + (9 × 106) + (4 × 105) + (9 × 103) + (1 × 102) + (7 × 101) + (9 × 100)
 45 forty-four million, eight hundred seventy-eight thousand, eight hundred forty
 46 (1 × 107) + (2 × 106) + (7 × 104) + (6 × 103) + (4 × 102) + (1 × 101) + (6 × 100)

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