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 7 minutes and 5 seconds remaining. How many seconds is that in total?
7 m · 5 s · Working backwards from fin…
2. A countdown timer shows 4 minutes and 5 seconds remaining. How many seconds is that in total?
4 m · 5 s · Working backwards from fin…
3. A countdown timer shows 3 minutes and 40 seconds remaining. How many seconds is that in total?
3 m · 40 s · Working backwards from fin…
4. A countdown timer shows 4 minutes and 15 seconds remaining. How many seconds is that in total?
4 m · 15 s · Working backwards from fin…
5. A countdown timer shows 13 minutes and 35 seconds remaining. How many seconds is that in total?
13 m · 35 s · Working backwards from fin…
6. A countdown timer shows 12 minutes and 40 seconds remaining. How many seconds is that in total?
12 m · 40 s · Working backwards from fin…
7. 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…
8. A countdown timer shows 10 minutes and 35 seconds remaining. How many seconds is that in total?
10 m · 35 s · Working backwards from fin…
9. A countdown timer shows 7 minutes and 20 seconds remaining. How many seconds is that in total?
7 m · 20 s · Working backwards from fin…
10. A countdown timer shows 15 minutes and 30 seconds remaining. How many seconds is that in total?
15 m · 30 s · Working backwards from fin…
11. A countdown timer shows 9 minutes and 10 seconds remaining. How many seconds is that in total?
9 m · 10 s · Working backwards from fin…
12. A countdown timer shows 12 minutes and 25 seconds remaining. How many seconds is that in total?
12 m · 25 s · Working backwards from fin…

12 questions · Seed 104742 · 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 7 minutes and 5 seconds remaining. How many seconds is that in total?
425 seconds
7 × 60 = 420 seconds, plus 5 seconds = 425 seconds.
2. A countdown timer shows 4 minutes and 5 seconds remaining. How many seconds is that in total?
245 seconds
4 × 60 = 240 seconds, plus 5 seconds = 245 seconds.
3. A countdown timer shows 3 minutes and 40 seconds remaining. How many seconds is that in total?
220 seconds
3 × 60 = 180 seconds, plus 40 seconds = 220 seconds.
4. A countdown timer shows 4 minutes and 15 seconds remaining. How many seconds is that in total?
255 seconds
4 × 60 = 240 seconds, plus 15 seconds = 255 seconds.
5. A countdown timer shows 13 minutes and 35 seconds remaining. How many seconds is that in total?
815 seconds
13 × 60 = 780 seconds, plus 35 seconds = 815 seconds.
6. A countdown timer shows 12 minutes and 40 seconds remaining. How many seconds is that in total?
760 seconds
12 × 60 = 720 seconds, plus 40 seconds = 760 seconds.
7. 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.
8. A countdown timer shows 10 minutes and 35 seconds remaining. How many seconds is that in total?
635 seconds
10 × 60 = 600 seconds, plus 35 seconds = 635 seconds.
9. A countdown timer shows 7 minutes and 20 seconds remaining. How many seconds is that in total?
440 seconds
7 × 60 = 420 seconds, plus 20 seconds = 440 seconds.
10. A countdown timer shows 15 minutes and 30 seconds remaining. How many seconds is that in total?
930 seconds
15 × 60 = 900 seconds, plus 30 seconds = 930 seconds.
11. A countdown timer shows 9 minutes and 10 seconds remaining. How many seconds is that in total?
550 seconds
9 × 60 = 540 seconds, plus 10 seconds = 550 seconds.
12. A countdown timer shows 12 minutes and 25 seconds remaining. How many seconds is that in total?
745 seconds
12 × 60 = 720 seconds, plus 25 seconds = 745 seconds.

12 questions · Seed 104742 · 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 7 minutes and 5 seconds remaining. How many seconds is that in total?
7 m · 5 s · Working backwards from fin…
2. A countdown timer shows 4 minutes and 5 seconds remaining. How many seconds is that in total?
4 m · 5 s · Working backwards from fin…
3. A countdown timer shows 3 minutes and 40 seconds remaining. How many seconds is that in total?
3 m · 40 s · Working backwards from fin…
4. A countdown timer shows 4 minutes and 15 seconds remaining. How many seconds is that in total?
4 m · 15 s · Working backwards from fin…
5. A countdown timer shows 13 minutes and 35 seconds remaining. How many seconds is that in total?
13 m · 35 s · Working backwards from fin…
6. A countdown timer shows 12 minutes and 40 seconds remaining. How many seconds is that in total?
12 m · 40 s · Working backwards from fin…
7. 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…
8. A countdown timer shows 10 minutes and 35 seconds remaining. How many seconds is that in total?
10 m · 35 s · Working backwards from fin…
9. A countdown timer shows 7 minutes and 20 seconds remaining. How many seconds is that in total?
7 m · 20 s · Working backwards from fin…
10. A countdown timer shows 15 minutes and 30 seconds remaining. How many seconds is that in total?
15 m · 30 s · Working backwards from fin…
11. A countdown timer shows 9 minutes and 10 seconds remaining. How many seconds is that in total?
9 m · 10 s · Working backwards from fin…
12. A countdown timer shows 12 minutes and 25 seconds remaining. How many seconds is that in total?
12 m · 25 s · Working backwards from fin…

12 questions · Seed 104742 · 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 7 minutes and 5 seconds remaining. How many seconds is that in total?
425 seconds
7 × 60 = 420 seconds, plus 5 seconds = 425 seconds.
2. A countdown timer shows 4 minutes and 5 seconds remaining. How many seconds is that in total?
245 seconds
4 × 60 = 240 seconds, plus 5 seconds = 245 seconds.
3. A countdown timer shows 3 minutes and 40 seconds remaining. How many seconds is that in total?
220 seconds
3 × 60 = 180 seconds, plus 40 seconds = 220 seconds.
4. A countdown timer shows 4 minutes and 15 seconds remaining. How many seconds is that in total?
255 seconds
4 × 60 = 240 seconds, plus 15 seconds = 255 seconds.
5. A countdown timer shows 13 minutes and 35 seconds remaining. How many seconds is that in total?
815 seconds
13 × 60 = 780 seconds, plus 35 seconds = 815 seconds.
6. A countdown timer shows 12 minutes and 40 seconds remaining. How many seconds is that in total?
760 seconds
12 × 60 = 720 seconds, plus 40 seconds = 760 seconds.
7. 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.
8. A countdown timer shows 10 minutes and 35 seconds remaining. How many seconds is that in total?
635 seconds
10 × 60 = 600 seconds, plus 35 seconds = 635 seconds.
9. A countdown timer shows 7 minutes and 20 seconds remaining. How many seconds is that in total?
440 seconds
7 × 60 = 420 seconds, plus 20 seconds = 440 seconds.
10. A countdown timer shows 15 minutes and 30 seconds remaining. How many seconds is that in total?
930 seconds
15 × 60 = 900 seconds, plus 30 seconds = 930 seconds.
11. A countdown timer shows 9 minutes and 10 seconds remaining. How many seconds is that in total?
550 seconds
9 × 60 = 540 seconds, plus 10 seconds = 550 seconds.
12. A countdown timer shows 12 minutes and 25 seconds remaining. How many seconds is that in total?
745 seconds
12 × 60 = 720 seconds, plus 25 seconds = 745 seconds.

12 questions · Seed 104742 · Age guidance, not curriculum certification