170
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1521215 thousands = 1500020 tens = 20017 ones = 12sum: 15000 + 200 + 12 = 15212standard form: 15212
What is the question ? How many powers of ten are involved ? . . . 5 of them How is the sum written in standard form ? . . . 483.12 How many digits in the standard form are even ? . . . 3 of them Is the sum divisible by 0.03 ? . . . Yes . . . . etc.
8*100 + 17*10 + 18*1 = 800 + 170 + 18 = 988
17 tens written in expanded form is 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10, which simplifies to 170. In expanded form, each digit is represented by its place value, with the tens digit multiplied by 10.
This depends on what your standard form is. Seventeen thousandths can be written as a fraction: 17/1000 (i.e. as 17 over 1000) It can be written as a decimal: 0.0017 It can be written in "scientific notation": 17 x 10-3