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Cogito

Grade 3 Math · Chapter 2 · Lesson 7

Practice Worksheet

Time Intervals

How long did that take?

10 problems · about 14 minutes · 3.MD.A.1

NameDate

Figure — use these to answer the problems

Jump to the next hour, then jump the minutes left.
0102030405060+ 20+ 15

40 + 20 + 15 = 60

Minutes past the hour at the start40
Jump to the hour20
Then this many more15
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

  1. From “Telling Time to the Minute”

    One mark past the 9. How many minutes past the hour?

    Answer

  2. From “Subtracting Within 1,000 Fluently”

    905 − 348 = ?

    Answer

  3. From “Adding Within 1,000 Fluently”

    385 + 247 = ?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. From 7:45 to 8:10. How many minutes?

    Answer

  2. Why count on to the hour first?

    • Because an hour is 60 minutes, not 100.
    • Because it looks tidier.

  3. From 1:10 to 1:45. How many minutes?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. From 5:50 to 6:20. How many minutes?

    Answer

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

3 problems

  1. From 9:35 to 10:05. How many minutes?

    Answer

  2. Break Time

    Break starts at 10:45 and ends at 11:05. How long is it?

    Answerminutes

  3. The Lesson

    A lesson runs from 2:20 to 2:55. How many minutes is that?

    Answerminutes