Standard form back to an ordinary number

Difficulty Stretch · Set ac4ct4

Fill in what you can and press Check. Nothing you type is sent anywhere.

1
1.11×10⁷=
2
6.27×10²=
3
0.2×10³=
4
7.23×10³=
5
2.55×10⁵=
6
2.98×10⁶=
7
4.79×10⁵=
8
7.15×10²=
9
2.56×10⁴=
10
7.31×10⁴=
11
3.73×10⁵=
12
0.64×10³=
13
8.62×10⁷=
14
6.61×10⁷=
15
8.85×10⁷=
16
3.4×10⁵=
17
3.84×10⁶=
18
1.69×10⁴=
19
1.06×10⁴=
20
2.91×10³=

What is in this set

The numbers in this set run from 0.13 to 10.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 100% of the problems: the power was multiplied instead of used as a count of zeros.
Answers are a whole number.

Drawing 240 problems from this page produced 236 different ones, 98% — so a sheet of 20 is a new sheet almost every time.

The same skill, harder or easier

We would put this in front of a grade 8 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.