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.

New variation Try interactive challenge Browse templates

Age band:Ages 7-9 Ages 10-12

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

Worksheet StudioPractice pack · Ages 10-12

Working backwards from finish time

Take your time. Show your thinking.

1. A countdown timer shows 13 minutes and 40 seconds remaining. How many seconds is that in total?
13 m · 40 s · Working backwards from fin…
2. A countdown timer shows 8 minutes and 50 seconds remaining. How many seconds is that in total?
8 m · 50 s · Working backwards from fin…
3. A countdown timer shows 6 minutes and 40 seconds remaining. How many seconds is that in total?
6 m · 40 s · Working backwards from fin…
4. A countdown timer shows 1 minute and 55 seconds remaining. How many seconds is that in total?
1 m · 55 s · Working backwards from fin…
5. 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…
6. 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…
7. A countdown timer shows 6 minutes and 15 seconds remaining. How many seconds is that in total?
6 m · 15 s · Working backwards from fin…
8. A countdown timer shows 6 minutes and 30 seconds remaining. How many seconds is that in total?
6 m · 30 s · Working backwards from fin…
9. 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…
10. A countdown timer shows 1 minute and 40 seconds remaining. How many seconds is that in total?
1 m · 40 s · Working backwards from fin…
11. 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…
12. A countdown timer shows 15 minutes and 45 seconds remaining. How many seconds is that in total?
15 m · 45 s · Working backwards from fin…

12 questions · Seed 104738 · 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 13 minutes and 40 seconds remaining. How many seconds is that in total?
820 seconds
13 × 60 = 780 seconds, plus 40 seconds = 820 seconds.
2. A countdown timer shows 8 minutes and 50 seconds remaining. How many seconds is that in total?
530 seconds
8 × 60 = 480 seconds, plus 50 seconds = 530 seconds.
3. A countdown timer shows 6 minutes and 40 seconds remaining. How many seconds is that in total?
400 seconds
6 × 60 = 360 seconds, plus 40 seconds = 400 seconds.
4. A countdown timer shows 1 minute and 55 seconds remaining. How many seconds is that in total?
115 seconds
1 × 60 = 60 seconds, plus 55 seconds = 115 seconds.
5. 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.
6. 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.
7. A countdown timer shows 6 minutes and 15 seconds remaining. How many seconds is that in total?
375 seconds
6 × 60 = 360 seconds, plus 15 seconds = 375 seconds.
8. A countdown timer shows 6 minutes and 30 seconds remaining. How many seconds is that in total?
390 seconds
6 × 60 = 360 seconds, plus 30 seconds = 390 seconds.
9. 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.
10. A countdown timer shows 1 minute and 40 seconds remaining. How many seconds is that in total?
100 seconds
1 × 60 = 60 seconds, plus 40 seconds = 100 seconds.
11. 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.
12. A countdown timer shows 15 minutes and 45 seconds remaining. How many seconds is that in total?
945 seconds
15 × 60 = 900 seconds, plus 45 seconds = 945 seconds.

12 questions · Seed 104738 · 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 13 minutes and 40 seconds remaining. How many seconds is that in total?
13 m · 40 s · Working backwards from fin…
2. A countdown timer shows 8 minutes and 50 seconds remaining. How many seconds is that in total?
8 m · 50 s · Working backwards from fin…
3. A countdown timer shows 6 minutes and 40 seconds remaining. How many seconds is that in total?
6 m · 40 s · Working backwards from fin…
4. A countdown timer shows 1 minute and 55 seconds remaining. How many seconds is that in total?
1 m · 55 s · Working backwards from fin…
5. 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…
6. 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…
7. A countdown timer shows 6 minutes and 15 seconds remaining. How many seconds is that in total?
6 m · 15 s · Working backwards from fin…
8. A countdown timer shows 6 minutes and 30 seconds remaining. How many seconds is that in total?
6 m · 30 s · Working backwards from fin…
9. 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…
10. A countdown timer shows 1 minute and 40 seconds remaining. How many seconds is that in total?
1 m · 40 s · Working backwards from fin…
11. 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…
12. A countdown timer shows 15 minutes and 45 seconds remaining. How many seconds is that in total?
15 m · 45 s · Working backwards from fin…

12 questions · Seed 104738 · 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 13 minutes and 40 seconds remaining. How many seconds is that in total?
820 seconds
13 × 60 = 780 seconds, plus 40 seconds = 820 seconds.
2. A countdown timer shows 8 minutes and 50 seconds remaining. How many seconds is that in total?
530 seconds
8 × 60 = 480 seconds, plus 50 seconds = 530 seconds.
3. A countdown timer shows 6 minutes and 40 seconds remaining. How many seconds is that in total?
400 seconds
6 × 60 = 360 seconds, plus 40 seconds = 400 seconds.
4. A countdown timer shows 1 minute and 55 seconds remaining. How many seconds is that in total?
115 seconds
1 × 60 = 60 seconds, plus 55 seconds = 115 seconds.
5. 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.
6. 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.
7. A countdown timer shows 6 minutes and 15 seconds remaining. How many seconds is that in total?
375 seconds
6 × 60 = 360 seconds, plus 15 seconds = 375 seconds.
8. A countdown timer shows 6 minutes and 30 seconds remaining. How many seconds is that in total?
390 seconds
6 × 60 = 360 seconds, plus 30 seconds = 390 seconds.
9. 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.
10. A countdown timer shows 1 minute and 40 seconds remaining. How many seconds is that in total?
100 seconds
1 × 60 = 60 seconds, plus 40 seconds = 100 seconds.
11. 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.
12. A countdown timer shows 15 minutes and 45 seconds remaining. How many seconds is that in total?
945 seconds
15 × 60 = 900 seconds, plus 45 seconds = 945 seconds.

12 questions · Seed 104738 · Age guidance, not curriculum certification