Distance from a speed and a time

Difficulty Standard · Set yujv52

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1
A train runs at 25 miles per hour for 4 hours. How far does it go, in miles?
2
A train runs at 20 miles per hour for 3 hours. How far does it go, in miles?
3
A train runs at 45 miles per hour for 8 hours. How far does it go, in miles?
4
A train runs at 30 miles per hour for 6 hours. How far does it go, in miles?
5
A train runs at 15 miles per hour for 3 hours. How far does it go, in miles?
6
A train runs at 35 miles per hour for 3 hours. How far does it go, in miles?
7
A train runs at 45 miles per hour for 8 hours. How far does it go, in miles?
8
A train runs at 40 miles per hour for 5 hours. How far does it go, in miles?
9
A train runs at 30 miles per hour for 3 hours. How far does it go, in miles?
10
A train runs at 30 miles per hour for 7 hours. How far does it go, in miles?
11
A train runs at 15 miles per hour for 3 hours. How far does it go, in miles?
12
A train runs at 40 miles per hour for 9 hours. How far does it go, in miles?
13
A train runs at 20 miles per hour for 4 hours. How far does it go, in miles?
14
A train runs at 45 miles per hour for 6 hours. How far does it go, in miles?
15
A train runs at 25 miles per hour for 9 hours. How far does it go, in miles?
16
A train runs at 30 miles per hour for 4 hours. How far does it go, in miles?
17
A train runs at 35 miles per hour for 5 hours. How far does it go, in miles?
18
A train runs at 45 miles per hour for 9 hours. How far does it go, in miles?
19
A train runs at 20 miles per hour for 7 hours. How far does it go, in miles?
20
A train runs at 25 miles per hour for 2 hours. How far does it go, in miles?

What is in this set

The numbers in this set run from 2 to 45.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 100% of the problems: the hours were taken off the speed; the distance is the speed repeated once for every hour, so it is a multiplication.
Answers are a whole number.

Drawing 240 problems from this page produced 56 different ones, 23% — so a sheet of 20 will come back to a problem you have seen — there are only so many sensible ones of this kind.

The same skill, harder or easier

We would put this in front of a grade 6 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.