jackie wrote 5,406,029 in expanded form this way:

[5 x 1,000,000] + [4 x 100,000] +

[6 x 10,000] + [2 x 10]

what two errors did jackie make?

6 x 1,000

he went wrong at 6 times 10000

To identify the errors made by Jackie, let's compare the expanded form provided with the actual expanded form of the number 5,406,029:

Actual expanded form:
[5 x 1,000,000] + [4 x 100,000] + [0 x 10,000] + [6 x 1,000] + [0 x 100] + [2 x 10] + [9 x 1]

Error 1: Jackie mistakenly skipped the place value for thousands (10,000). Instead of writing the correct expanded form of [0 x 10,000], Jackie wrote [6 x 10,000].

Error 2: Jackie incorrectly included the place value for one (1), which is not present in the original number. Jackie wrote [9 x 1], but the correct expanded form does not have a digit in the ones position.

Therefore, the two errors made by Jackie are:
1. Mistakenly including the place value for thousands.
2. Incorrectly including the digit in the ones position.