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 2 minutes and 20 seconds remaining. How many seconds is that in total?
2 m · 20 s · Working backwards from fin…
2. A countdown timer shows 2 minutes and 30 seconds remaining. How many seconds is that in total?
2 m · 30 s · Working backwards from fin…
3. A countdown timer shows 7 minutes and 45 seconds remaining. How many seconds is that in total?
7 m · 45 s · Working backwards from fin…
4. 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…
5. 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…
6. A countdown timer shows 9 minutes and 30 seconds remaining. How many seconds is that in total?
9 m · 30 s · Working backwards from fin…
7. A countdown timer shows 9 minutes and 35 seconds remaining. How many seconds is that in total?
9 m · 35 s · Working backwards from fin…
8. A countdown timer shows 15 minutes and 5 seconds remaining. How many seconds is that in total?
15 m · 5 s · Working backwards from fin…
9. A countdown timer shows 1 minute and 25 seconds remaining. How many seconds is that in total?
1 m · 25 s · Working backwards from fin…
10. A countdown timer shows 3 minutes and 5 seconds remaining. How many seconds is that in total?
3 m · 5 s · Working backwards from fin…
11. 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…
12. A countdown timer shows 8 minutes and 5 seconds remaining. How many seconds is that in total?
8 m · 5 s · Working backwards from fin…

12 questions · Seed 104750 · 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 2 minutes and 20 seconds remaining. How many seconds is that in total?
140 seconds
2 × 60 = 120 seconds, plus 20 seconds = 140 seconds.
2. A countdown timer shows 2 minutes and 30 seconds remaining. How many seconds is that in total?
150 seconds
2 × 60 = 120 seconds, plus 30 seconds = 150 seconds.
3. A countdown timer shows 7 minutes and 45 seconds remaining. How many seconds is that in total?
465 seconds
7 × 60 = 420 seconds, plus 45 seconds = 465 seconds.
4. 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.
5. 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.
6. A countdown timer shows 9 minutes and 30 seconds remaining. How many seconds is that in total?
570 seconds
9 × 60 = 540 seconds, plus 30 seconds = 570 seconds.
7. A countdown timer shows 9 minutes and 35 seconds remaining. How many seconds is that in total?
575 seconds
9 × 60 = 540 seconds, plus 35 seconds = 575 seconds.
8. A countdown timer shows 15 minutes and 5 seconds remaining. How many seconds is that in total?
905 seconds
15 × 60 = 900 seconds, plus 5 seconds = 905 seconds.
9. A countdown timer shows 1 minute and 25 seconds remaining. How many seconds is that in total?
85 seconds
1 × 60 = 60 seconds, plus 25 seconds = 85 seconds.
10. A countdown timer shows 3 minutes and 5 seconds remaining. How many seconds is that in total?
185 seconds
3 × 60 = 180 seconds, plus 5 seconds = 185 seconds.
11. 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.
12. A countdown timer shows 8 minutes and 5 seconds remaining. How many seconds is that in total?
485 seconds
8 × 60 = 480 seconds, plus 5 seconds = 485 seconds.

12 questions · Seed 104750 · 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 2 minutes and 20 seconds remaining. How many seconds is that in total?
2 m · 20 s · Working backwards from fin…
2. A countdown timer shows 2 minutes and 30 seconds remaining. How many seconds is that in total?
2 m · 30 s · Working backwards from fin…
3. A countdown timer shows 7 minutes and 45 seconds remaining. How many seconds is that in total?
7 m · 45 s · Working backwards from fin…
4. 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…
5. 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…
6. A countdown timer shows 9 minutes and 30 seconds remaining. How many seconds is that in total?
9 m · 30 s · Working backwards from fin…
7. A countdown timer shows 9 minutes and 35 seconds remaining. How many seconds is that in total?
9 m · 35 s · Working backwards from fin…
8. A countdown timer shows 15 minutes and 5 seconds remaining. How many seconds is that in total?
15 m · 5 s · Working backwards from fin…
9. A countdown timer shows 1 minute and 25 seconds remaining. How many seconds is that in total?
1 m · 25 s · Working backwards from fin…
10. A countdown timer shows 3 minutes and 5 seconds remaining. How many seconds is that in total?
3 m · 5 s · Working backwards from fin…
11. 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…
12. A countdown timer shows 8 minutes and 5 seconds remaining. How many seconds is that in total?
8 m · 5 s · Working backwards from fin…

12 questions · Seed 104750 · 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 2 minutes and 20 seconds remaining. How many seconds is that in total?
140 seconds
2 × 60 = 120 seconds, plus 20 seconds = 140 seconds.
2. A countdown timer shows 2 minutes and 30 seconds remaining. How many seconds is that in total?
150 seconds
2 × 60 = 120 seconds, plus 30 seconds = 150 seconds.
3. A countdown timer shows 7 minutes and 45 seconds remaining. How many seconds is that in total?
465 seconds
7 × 60 = 420 seconds, plus 45 seconds = 465 seconds.
4. 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.
5. 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.
6. A countdown timer shows 9 minutes and 30 seconds remaining. How many seconds is that in total?
570 seconds
9 × 60 = 540 seconds, plus 30 seconds = 570 seconds.
7. A countdown timer shows 9 minutes and 35 seconds remaining. How many seconds is that in total?
575 seconds
9 × 60 = 540 seconds, plus 35 seconds = 575 seconds.
8. A countdown timer shows 15 minutes and 5 seconds remaining. How many seconds is that in total?
905 seconds
15 × 60 = 900 seconds, plus 5 seconds = 905 seconds.
9. A countdown timer shows 1 minute and 25 seconds remaining. How many seconds is that in total?
85 seconds
1 × 60 = 60 seconds, plus 25 seconds = 85 seconds.
10. A countdown timer shows 3 minutes and 5 seconds remaining. How many seconds is that in total?
185 seconds
3 × 60 = 180 seconds, plus 5 seconds = 185 seconds.
11. 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.
12. A countdown timer shows 8 minutes and 5 seconds remaining. How many seconds is that in total?
485 seconds
8 × 60 = 480 seconds, plus 5 seconds = 485 seconds.

12 questions · Seed 104750 · Age guidance, not curriculum certification