Time & moneyAges 7-9

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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Worksheet StudioPractice pack · Ages 7-9

Working backwards from finish time

Take your time. Show your thinking.

1. A countdown timer shows 15 minutes and 25 seconds remaining. How many seconds is that in total?
15 m · 25 s · Working backwards from fin…
2. A countdown timer shows 9 minutes and 5 seconds remaining. How many seconds is that in total?
9 m · 5 s · Working backwards from fin…
3. A countdown timer shows 15 minutes and 20 seconds remaining. How many seconds is that in total?
15 m · 20 s · Working backwards from fin…
4. A countdown timer shows 5 minutes and 40 seconds remaining. How many seconds is that in total?
5 m · 40 s · Working backwards from fin…
5. A countdown timer shows 6 minutes and 10 seconds remaining. How many seconds is that in total?
6 m · 10 s · Working backwards from fin…
6. A countdown timer shows 3 minutes and 55 seconds remaining. How many seconds is that in total?
3 m · 55 s · Working backwards from fin…
7. A countdown timer shows 9 minutes and 55 seconds remaining. How many seconds is that in total?
9 m · 55 s · Working backwards from fin…
8. 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…
9. A countdown timer shows 2 minutes and 55 seconds remaining. How many seconds is that in total?
2 m · 55 s · Working backwards from fin…
10. A countdown timer shows 7 minutes and 35 seconds remaining. How many seconds is that in total?
7 m · 35 s · Working backwards from fin…
11. A countdown timer shows 10 minutes and 20 seconds remaining. How many seconds is that in total?
10 m · 20 s · Working backwards from fin…
12. A countdown timer shows 2 minutes and 35 seconds remaining. How many seconds is that in total?
2 m · 35 s · Working backwards from fin…

12 questions · Seed 104753 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 7-9

Working backwards from finish time

Answers and reasoning. Review before teaching.

1. A countdown timer shows 15 minutes and 25 seconds remaining. How many seconds is that in total?
925 seconds
15 × 60 = 900 seconds, plus 25 seconds = 925 seconds.
2. A countdown timer shows 9 minutes and 5 seconds remaining. How many seconds is that in total?
545 seconds
9 × 60 = 540 seconds, plus 5 seconds = 545 seconds.
3. A countdown timer shows 15 minutes and 20 seconds remaining. How many seconds is that in total?
920 seconds
15 × 60 = 900 seconds, plus 20 seconds = 920 seconds.
4. A countdown timer shows 5 minutes and 40 seconds remaining. How many seconds is that in total?
340 seconds
5 × 60 = 300 seconds, plus 40 seconds = 340 seconds.
5. A countdown timer shows 6 minutes and 10 seconds remaining. How many seconds is that in total?
370 seconds
6 × 60 = 360 seconds, plus 10 seconds = 370 seconds.
6. A countdown timer shows 3 minutes and 55 seconds remaining. How many seconds is that in total?
235 seconds
3 × 60 = 180 seconds, plus 55 seconds = 235 seconds.
7. A countdown timer shows 9 minutes and 55 seconds remaining. How many seconds is that in total?
595 seconds
9 × 60 = 540 seconds, plus 55 seconds = 595 seconds.
8. 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.
9. A countdown timer shows 2 minutes and 55 seconds remaining. How many seconds is that in total?
175 seconds
2 × 60 = 120 seconds, plus 55 seconds = 175 seconds.
10. A countdown timer shows 7 minutes and 35 seconds remaining. How many seconds is that in total?
455 seconds
7 × 60 = 420 seconds, plus 35 seconds = 455 seconds.
11. A countdown timer shows 10 minutes and 20 seconds remaining. How many seconds is that in total?
620 seconds
10 × 60 = 600 seconds, plus 20 seconds = 620 seconds.
12. A countdown timer shows 2 minutes and 35 seconds remaining. How many seconds is that in total?
155 seconds
2 × 60 = 120 seconds, plus 35 seconds = 155 seconds.

12 questions · Seed 104753 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 7-9

Working backwards from finish time

Take your time. Show your thinking.

1. A countdown timer shows 15 minutes and 25 seconds remaining. How many seconds is that in total?
15 m · 25 s · Working backwards from fin…
2. A countdown timer shows 9 minutes and 5 seconds remaining. How many seconds is that in total?
9 m · 5 s · Working backwards from fin…
3. A countdown timer shows 15 minutes and 20 seconds remaining. How many seconds is that in total?
15 m · 20 s · Working backwards from fin…
4. A countdown timer shows 5 minutes and 40 seconds remaining. How many seconds is that in total?
5 m · 40 s · Working backwards from fin…
5. A countdown timer shows 6 minutes and 10 seconds remaining. How many seconds is that in total?
6 m · 10 s · Working backwards from fin…
6. A countdown timer shows 3 minutes and 55 seconds remaining. How many seconds is that in total?
3 m · 55 s · Working backwards from fin…
7. A countdown timer shows 9 minutes and 55 seconds remaining. How many seconds is that in total?
9 m · 55 s · Working backwards from fin…
8. 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…
9. A countdown timer shows 2 minutes and 55 seconds remaining. How many seconds is that in total?
2 m · 55 s · Working backwards from fin…
10. A countdown timer shows 7 minutes and 35 seconds remaining. How many seconds is that in total?
7 m · 35 s · Working backwards from fin…
11. A countdown timer shows 10 minutes and 20 seconds remaining. How many seconds is that in total?
10 m · 20 s · Working backwards from fin…
12. A countdown timer shows 2 minutes and 35 seconds remaining. How many seconds is that in total?
2 m · 35 s · Working backwards from fin…

12 questions · Seed 104753 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 7-9

Working backwards from finish time

Answers and reasoning. Review before teaching.

1. A countdown timer shows 15 minutes and 25 seconds remaining. How many seconds is that in total?
925 seconds
15 × 60 = 900 seconds, plus 25 seconds = 925 seconds.
2. A countdown timer shows 9 minutes and 5 seconds remaining. How many seconds is that in total?
545 seconds
9 × 60 = 540 seconds, plus 5 seconds = 545 seconds.
3. A countdown timer shows 15 minutes and 20 seconds remaining. How many seconds is that in total?
920 seconds
15 × 60 = 900 seconds, plus 20 seconds = 920 seconds.
4. A countdown timer shows 5 minutes and 40 seconds remaining. How many seconds is that in total?
340 seconds
5 × 60 = 300 seconds, plus 40 seconds = 340 seconds.
5. A countdown timer shows 6 minutes and 10 seconds remaining. How many seconds is that in total?
370 seconds
6 × 60 = 360 seconds, plus 10 seconds = 370 seconds.
6. A countdown timer shows 3 minutes and 55 seconds remaining. How many seconds is that in total?
235 seconds
3 × 60 = 180 seconds, plus 55 seconds = 235 seconds.
7. A countdown timer shows 9 minutes and 55 seconds remaining. How many seconds is that in total?
595 seconds
9 × 60 = 540 seconds, plus 55 seconds = 595 seconds.
8. 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.
9. A countdown timer shows 2 minutes and 55 seconds remaining. How many seconds is that in total?
175 seconds
2 × 60 = 120 seconds, plus 55 seconds = 175 seconds.
10. A countdown timer shows 7 minutes and 35 seconds remaining. How many seconds is that in total?
455 seconds
7 × 60 = 420 seconds, plus 35 seconds = 455 seconds.
11. A countdown timer shows 10 minutes and 20 seconds remaining. How many seconds is that in total?
620 seconds
10 × 60 = 600 seconds, plus 20 seconds = 620 seconds.
12. A countdown timer shows 2 minutes and 35 seconds remaining. How many seconds is that in total?
155 seconds
2 × 60 = 120 seconds, plus 35 seconds = 155 seconds.

12 questions · Seed 104753 · Age guidance, not curriculum certification