Time & moneyAges 10-12

Working backwards from finish time

Count backwards in minutes from an activity’s finish time to find when it started. Review suitability for your learners before teaching.

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Age band:Ages 7-9 Ages 10-12

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Worksheet StudioPractice pack · Ages 10-12

Working backwards from finish time

Take your time. Show your thinking.

1. A countdown timer shows 2 minutes and 15 seconds remaining. How many seconds is that in total?
2 m · 15 s · Working backwards from fin…
2. A countdown timer shows 2 minutes and 20 seconds remaining. How many seconds is that in total?
2 m · 20 s · Working backwards from fin…
3. A countdown timer shows 5 minutes and 45 seconds remaining. How many seconds is that in total?
5 m · 45 s · Working backwards from fin…
4. A countdown timer shows 5 minutes and 20 seconds remaining. How many seconds is that in total?
5 m · 20 s · Working backwards from fin…
5. A countdown timer shows 13 minutes and 30 seconds remaining. How many seconds is that in total?
13 m · 30 s · Working backwards from fin…
6. A countdown timer shows 14 minutes and 15 seconds remaining. How many seconds is that in total?
14 m · 15 s · Working backwards from fin…
7. A countdown timer shows 4 minutes and 35 seconds remaining. How many seconds is that in total?
4 m · 35 s · Working backwards from fin…
8. A countdown timer shows 11 minutes and 35 seconds remaining. How many seconds is that in total?
11 m · 35 s · Working backwards from fin…
9. A countdown timer shows 14 minutes and 20 seconds remaining. How many seconds is that in total?
14 m · 20 s · Working backwards from fin…
10. A countdown timer shows 14 minutes and 5 seconds remaining. How many seconds is that in total?
14 m · 5 s · Working backwards from fin…
11. A countdown timer shows 12 minutes and 35 seconds remaining. How many seconds is that in total?
12 m · 35 s · Working backwards from fin…
12. A countdown timer shows 7 minutes and 15 seconds remaining. How many seconds is that in total?
7 m · 15 s · Working backwards from fin…

12 questions · Seed 104749 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 10-12

Working backwards from finish time

Answers and reasoning. Review before teaching.

1. A countdown timer shows 2 minutes and 15 seconds remaining. How many seconds is that in total?
135 seconds
2 × 60 = 120 seconds, plus 15 seconds = 135 seconds.
2. A countdown timer shows 2 minutes and 20 seconds remaining. How many seconds is that in total?
140 seconds
2 × 60 = 120 seconds, plus 20 seconds = 140 seconds.
3. A countdown timer shows 5 minutes and 45 seconds remaining. How many seconds is that in total?
345 seconds
5 × 60 = 300 seconds, plus 45 seconds = 345 seconds.
4. A countdown timer shows 5 minutes and 20 seconds remaining. How many seconds is that in total?
320 seconds
5 × 60 = 300 seconds, plus 20 seconds = 320 seconds.
5. A countdown timer shows 13 minutes and 30 seconds remaining. How many seconds is that in total?
810 seconds
13 × 60 = 780 seconds, plus 30 seconds = 810 seconds.
6. A countdown timer shows 14 minutes and 15 seconds remaining. How many seconds is that in total?
855 seconds
14 × 60 = 840 seconds, plus 15 seconds = 855 seconds.
7. A countdown timer shows 4 minutes and 35 seconds remaining. How many seconds is that in total?
275 seconds
4 × 60 = 240 seconds, plus 35 seconds = 275 seconds.
8. A countdown timer shows 11 minutes and 35 seconds remaining. How many seconds is that in total?
695 seconds
11 × 60 = 660 seconds, plus 35 seconds = 695 seconds.
9. A countdown timer shows 14 minutes and 20 seconds remaining. How many seconds is that in total?
860 seconds
14 × 60 = 840 seconds, plus 20 seconds = 860 seconds.
10. A countdown timer shows 14 minutes and 5 seconds remaining. How many seconds is that in total?
845 seconds
14 × 60 = 840 seconds, plus 5 seconds = 845 seconds.
11. A countdown timer shows 12 minutes and 35 seconds remaining. How many seconds is that in total?
755 seconds
12 × 60 = 720 seconds, plus 35 seconds = 755 seconds.
12. A countdown timer shows 7 minutes and 15 seconds remaining. How many seconds is that in total?
435 seconds
7 × 60 = 420 seconds, plus 15 seconds = 435 seconds.

12 questions · Seed 104749 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 10-12

Working backwards from finish time

Take your time. Show your thinking.

1. A countdown timer shows 2 minutes and 15 seconds remaining. How many seconds is that in total?
2 m · 15 s · Working backwards from fin…
2. A countdown timer shows 2 minutes and 20 seconds remaining. How many seconds is that in total?
2 m · 20 s · Working backwards from fin…
3. A countdown timer shows 5 minutes and 45 seconds remaining. How many seconds is that in total?
5 m · 45 s · Working backwards from fin…
4. A countdown timer shows 5 minutes and 20 seconds remaining. How many seconds is that in total?
5 m · 20 s · Working backwards from fin…
5. A countdown timer shows 13 minutes and 30 seconds remaining. How many seconds is that in total?
13 m · 30 s · Working backwards from fin…
6. A countdown timer shows 14 minutes and 15 seconds remaining. How many seconds is that in total?
14 m · 15 s · Working backwards from fin…
7. A countdown timer shows 4 minutes and 35 seconds remaining. How many seconds is that in total?
4 m · 35 s · Working backwards from fin…
8. A countdown timer shows 11 minutes and 35 seconds remaining. How many seconds is that in total?
11 m · 35 s · Working backwards from fin…
9. A countdown timer shows 14 minutes and 20 seconds remaining. How many seconds is that in total?
14 m · 20 s · Working backwards from fin…
10. A countdown timer shows 14 minutes and 5 seconds remaining. How many seconds is that in total?
14 m · 5 s · Working backwards from fin…
11. A countdown timer shows 12 minutes and 35 seconds remaining. How many seconds is that in total?
12 m · 35 s · Working backwards from fin…
12. A countdown timer shows 7 minutes and 15 seconds remaining. How many seconds is that in total?
7 m · 15 s · Working backwards from fin…

12 questions · Seed 104749 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 10-12

Working backwards from finish time

Answers and reasoning. Review before teaching.

1. A countdown timer shows 2 minutes and 15 seconds remaining. How many seconds is that in total?
135 seconds
2 × 60 = 120 seconds, plus 15 seconds = 135 seconds.
2. A countdown timer shows 2 minutes and 20 seconds remaining. How many seconds is that in total?
140 seconds
2 × 60 = 120 seconds, plus 20 seconds = 140 seconds.
3. A countdown timer shows 5 minutes and 45 seconds remaining. How many seconds is that in total?
345 seconds
5 × 60 = 300 seconds, plus 45 seconds = 345 seconds.
4. A countdown timer shows 5 minutes and 20 seconds remaining. How many seconds is that in total?
320 seconds
5 × 60 = 300 seconds, plus 20 seconds = 320 seconds.
5. A countdown timer shows 13 minutes and 30 seconds remaining. How many seconds is that in total?
810 seconds
13 × 60 = 780 seconds, plus 30 seconds = 810 seconds.
6. A countdown timer shows 14 minutes and 15 seconds remaining. How many seconds is that in total?
855 seconds
14 × 60 = 840 seconds, plus 15 seconds = 855 seconds.
7. A countdown timer shows 4 minutes and 35 seconds remaining. How many seconds is that in total?
275 seconds
4 × 60 = 240 seconds, plus 35 seconds = 275 seconds.
8. A countdown timer shows 11 minutes and 35 seconds remaining. How many seconds is that in total?
695 seconds
11 × 60 = 660 seconds, plus 35 seconds = 695 seconds.
9. A countdown timer shows 14 minutes and 20 seconds remaining. How many seconds is that in total?
860 seconds
14 × 60 = 840 seconds, plus 20 seconds = 860 seconds.
10. A countdown timer shows 14 minutes and 5 seconds remaining. How many seconds is that in total?
845 seconds
14 × 60 = 840 seconds, plus 5 seconds = 845 seconds.
11. A countdown timer shows 12 minutes and 35 seconds remaining. How many seconds is that in total?
755 seconds
12 × 60 = 720 seconds, plus 35 seconds = 755 seconds.
12. A countdown timer shows 7 minutes and 15 seconds remaining. How many seconds is that in total?
435 seconds
7 × 60 = 420 seconds, plus 15 seconds = 435 seconds.

12 questions · Seed 104749 · Age guidance, not curriculum certification