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 11 minutes and 55 seconds remaining. How many seconds is that in total?
11 m · 55 s · Working backwards from fin…
2. A countdown timer shows 3 minutes and 50 seconds remaining. How many seconds is that in total?
3 m · 50 s · Working backwards from fin…
3. 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…
4. A countdown timer shows 11 minutes and 30 seconds remaining. How many seconds is that in total?
11 m · 30 s · Working backwards from fin…
5. A countdown timer shows 6 minutes and 5 seconds remaining. How many seconds is that in total?
6 m · 5 s · Working backwards from fin…
6. A countdown timer shows 9 minutes and 25 seconds remaining. How many seconds is that in total?
9 m · 25 s · Working backwards from fin…
7. A countdown timer shows 2 minutes and 25 seconds remaining. How many seconds is that in total?
2 m · 25 s · Working backwards from fin…
8. A countdown timer shows 10 minutes and 30 seconds remaining. How many seconds is that in total?
10 m · 30 s · Working backwards from fin…
9. A countdown timer shows 9 minutes and 50 seconds remaining. How many seconds is that in total?
9 m · 50 s · Working backwards from fin…
10. A countdown timer shows 2 minutes and 50 seconds remaining. How many seconds is that in total?
2 m · 50 s · Working backwards from fin…
11. A countdown timer shows 10 minutes and 50 seconds remaining. How many seconds is that in total?
10 m · 50 s · Working backwards from fin…
12. A countdown timer shows 8 minutes and 20 seconds remaining. How many seconds is that in total?
8 m · 20 s · Working backwards from fin…

12 questions · Seed 47 · 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 11 minutes and 55 seconds remaining. How many seconds is that in total?
715 seconds
11 × 60 = 660 seconds, plus 55 seconds = 715 seconds.
2. A countdown timer shows 3 minutes and 50 seconds remaining. How many seconds is that in total?
230 seconds
3 × 60 = 180 seconds, plus 50 seconds = 230 seconds.
3. 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.
4. A countdown timer shows 11 minutes and 30 seconds remaining. How many seconds is that in total?
690 seconds
11 × 60 = 660 seconds, plus 30 seconds = 690 seconds.
5. A countdown timer shows 6 minutes and 5 seconds remaining. How many seconds is that in total?
365 seconds
6 × 60 = 360 seconds, plus 5 seconds = 365 seconds.
6. A countdown timer shows 9 minutes and 25 seconds remaining. How many seconds is that in total?
565 seconds
9 × 60 = 540 seconds, plus 25 seconds = 565 seconds.
7. A countdown timer shows 2 minutes and 25 seconds remaining. How many seconds is that in total?
145 seconds
2 × 60 = 120 seconds, plus 25 seconds = 145 seconds.
8. A countdown timer shows 10 minutes and 30 seconds remaining. How many seconds is that in total?
630 seconds
10 × 60 = 600 seconds, plus 30 seconds = 630 seconds.
9. A countdown timer shows 9 minutes and 50 seconds remaining. How many seconds is that in total?
590 seconds
9 × 60 = 540 seconds, plus 50 seconds = 590 seconds.
10. A countdown timer shows 2 minutes and 50 seconds remaining. How many seconds is that in total?
170 seconds
2 × 60 = 120 seconds, plus 50 seconds = 170 seconds.
11. A countdown timer shows 10 minutes and 50 seconds remaining. How many seconds is that in total?
650 seconds
10 × 60 = 600 seconds, plus 50 seconds = 650 seconds.
12. A countdown timer shows 8 minutes and 20 seconds remaining. How many seconds is that in total?
500 seconds
8 × 60 = 480 seconds, plus 20 seconds = 500 seconds.

12 questions · Seed 47 · 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 11 minutes and 55 seconds remaining. How many seconds is that in total?
11 m · 55 s · Working backwards from fin…
2. A countdown timer shows 3 minutes and 50 seconds remaining. How many seconds is that in total?
3 m · 50 s · Working backwards from fin…
3. 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…
4. A countdown timer shows 11 minutes and 30 seconds remaining. How many seconds is that in total?
11 m · 30 s · Working backwards from fin…
5. A countdown timer shows 6 minutes and 5 seconds remaining. How many seconds is that in total?
6 m · 5 s · Working backwards from fin…
6. A countdown timer shows 9 minutes and 25 seconds remaining. How many seconds is that in total?
9 m · 25 s · Working backwards from fin…
7. A countdown timer shows 2 minutes and 25 seconds remaining. How many seconds is that in total?
2 m · 25 s · Working backwards from fin…
8. A countdown timer shows 10 minutes and 30 seconds remaining. How many seconds is that in total?
10 m · 30 s · Working backwards from fin…
9. A countdown timer shows 9 minutes and 50 seconds remaining. How many seconds is that in total?
9 m · 50 s · Working backwards from fin…
10. A countdown timer shows 2 minutes and 50 seconds remaining. How many seconds is that in total?
2 m · 50 s · Working backwards from fin…
11. A countdown timer shows 10 minutes and 50 seconds remaining. How many seconds is that in total?
10 m · 50 s · Working backwards from fin…
12. A countdown timer shows 8 minutes and 20 seconds remaining. How many seconds is that in total?
8 m · 20 s · Working backwards from fin…

12 questions · Seed 47 · 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 11 minutes and 55 seconds remaining. How many seconds is that in total?
715 seconds
11 × 60 = 660 seconds, plus 55 seconds = 715 seconds.
2. A countdown timer shows 3 minutes and 50 seconds remaining. How many seconds is that in total?
230 seconds
3 × 60 = 180 seconds, plus 50 seconds = 230 seconds.
3. 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.
4. A countdown timer shows 11 minutes and 30 seconds remaining. How many seconds is that in total?
690 seconds
11 × 60 = 660 seconds, plus 30 seconds = 690 seconds.
5. A countdown timer shows 6 minutes and 5 seconds remaining. How many seconds is that in total?
365 seconds
6 × 60 = 360 seconds, plus 5 seconds = 365 seconds.
6. A countdown timer shows 9 minutes and 25 seconds remaining. How many seconds is that in total?
565 seconds
9 × 60 = 540 seconds, plus 25 seconds = 565 seconds.
7. A countdown timer shows 2 minutes and 25 seconds remaining. How many seconds is that in total?
145 seconds
2 × 60 = 120 seconds, plus 25 seconds = 145 seconds.
8. A countdown timer shows 10 minutes and 30 seconds remaining. How many seconds is that in total?
630 seconds
10 × 60 = 600 seconds, plus 30 seconds = 630 seconds.
9. A countdown timer shows 9 minutes and 50 seconds remaining. How many seconds is that in total?
590 seconds
9 × 60 = 540 seconds, plus 50 seconds = 590 seconds.
10. A countdown timer shows 2 minutes and 50 seconds remaining. How many seconds is that in total?
170 seconds
2 × 60 = 120 seconds, plus 50 seconds = 170 seconds.
11. A countdown timer shows 10 minutes and 50 seconds remaining. How many seconds is that in total?
650 seconds
10 × 60 = 600 seconds, plus 50 seconds = 650 seconds.
12. A countdown timer shows 8 minutes and 20 seconds remaining. How many seconds is that in total?
500 seconds
8 × 60 = 480 seconds, plus 20 seconds = 500 seconds.

12 questions · Seed 47 · Age guidance, not curriculum certification