Oh, dude, like, expanded notation is just a fancy way of breaking down a number into its different place values. So, for 1183541029, you'd write it as 1 billion + 1 hundred million + 8 ten million + 3 million + 5 hundred thousand + 4 ten thousand + 1 thousand + 0 hundreds + 2 tens + 9 ones. Easy peasy!
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To write 1183541029 in expanded notation, we break down the number by each place value. The expanded notation for 1183541029 is 1 billion + 1 hundred million + 8 ten million + 3 million + 5 hundred thousand + 4 ten thousand + 1 thousand + 0 hundreds + 2 tens + 9 ones.
Expanded Notation of 408 = (4 x 100) + (0 x 10) + (8 x 1).
Expanded notation of 900 = (9 x 100) + (0 x 10) + (0 x 1)
In expanded notation you would write the number 42,166,037 as: 40,000,000 + 2,000,000 + 100,000 + 60,000 + 6,000 + 30 + 7.
(6*10)+(2*1)+(4*0.01)
2.5 x 105 = 250,000