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 15 seconds remaining. How many seconds is that in total?
2 m · 15 s · Working backwards from fin…
2. A countdown timer shows 5 minutes and 35 seconds remaining. How many seconds is that in total?
5 m · 35 s · Working backwards from fin…
3. A countdown timer shows 1 minute and 45 seconds remaining. How many seconds is that in total?
1 m · 45 s · Working backwards from fin…
4. A countdown timer shows 1 minute and 5 seconds remaining. How many seconds is that in total?
1 m · 5 s · Working backwards from fin…
5. A countdown timer shows 6 minutes and 50 seconds remaining. How many seconds is that in total?
6 m · 50 s · Working backwards from fin…
6. A countdown timer shows 3 minutes and 35 seconds remaining. How many seconds is that in total?
3 m · 35 s · Working backwards from fin…
7. 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…
8. A countdown timer shows 2 minutes and 40 seconds remaining. How many seconds is that in total?
2 m · 40 s · Working backwards from fin…
9. 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…
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 2 minutes and 25 seconds remaining. How many seconds is that in total?
2 m · 25 s · Working backwards from fin…
12. A countdown timer shows 13 minutes and 30 seconds remaining. How many seconds is that in total?
13 m · 30 s · Working backwards from fin…

12 questions · Seed 52 · 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 15 seconds remaining. How many seconds is that in total?
135 seconds
2 × 60 = 120 seconds, plus 15 seconds = 135 seconds.
2. A countdown timer shows 5 minutes and 35 seconds remaining. How many seconds is that in total?
335 seconds
5 × 60 = 300 seconds, plus 35 seconds = 335 seconds.
3. A countdown timer shows 1 minute and 45 seconds remaining. How many seconds is that in total?
105 seconds
1 × 60 = 60 seconds, plus 45 seconds = 105 seconds.
4. A countdown timer shows 1 minute and 5 seconds remaining. How many seconds is that in total?
65 seconds
1 × 60 = 60 seconds, plus 5 seconds = 65 seconds.
5. A countdown timer shows 6 minutes and 50 seconds remaining. How many seconds is that in total?
410 seconds
6 × 60 = 360 seconds, plus 50 seconds = 410 seconds.
6. A countdown timer shows 3 minutes and 35 seconds remaining. How many seconds is that in total?
215 seconds
3 × 60 = 180 seconds, plus 35 seconds = 215 seconds.
7. 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.
8. A countdown timer shows 2 minutes and 40 seconds remaining. How many seconds is that in total?
160 seconds
2 × 60 = 120 seconds, plus 40 seconds = 160 seconds.
9. 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.
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 2 minutes and 25 seconds remaining. How many seconds is that in total?
145 seconds
2 × 60 = 120 seconds, plus 25 seconds = 145 seconds.
12. A countdown timer shows 13 minutes and 30 seconds remaining. How many seconds is that in total?
810 seconds
13 × 60 = 780 seconds, plus 30 seconds = 810 seconds.

12 questions · Seed 52 · 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 15 seconds remaining. How many seconds is that in total?
2 m · 15 s · Working backwards from fin…
2. A countdown timer shows 5 minutes and 35 seconds remaining. How many seconds is that in total?
5 m · 35 s · Working backwards from fin…
3. A countdown timer shows 1 minute and 45 seconds remaining. How many seconds is that in total?
1 m · 45 s · Working backwards from fin…
4. A countdown timer shows 1 minute and 5 seconds remaining. How many seconds is that in total?
1 m · 5 s · Working backwards from fin…
5. A countdown timer shows 6 minutes and 50 seconds remaining. How many seconds is that in total?
6 m · 50 s · Working backwards from fin…
6. A countdown timer shows 3 minutes and 35 seconds remaining. How many seconds is that in total?
3 m · 35 s · Working backwards from fin…
7. 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…
8. A countdown timer shows 2 minutes and 40 seconds remaining. How many seconds is that in total?
2 m · 40 s · Working backwards from fin…
9. 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…
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 2 minutes and 25 seconds remaining. How many seconds is that in total?
2 m · 25 s · Working backwards from fin…
12. A countdown timer shows 13 minutes and 30 seconds remaining. How many seconds is that in total?
13 m · 30 s · Working backwards from fin…

12 questions · Seed 52 · 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 15 seconds remaining. How many seconds is that in total?
135 seconds
2 × 60 = 120 seconds, plus 15 seconds = 135 seconds.
2. A countdown timer shows 5 minutes and 35 seconds remaining. How many seconds is that in total?
335 seconds
5 × 60 = 300 seconds, plus 35 seconds = 335 seconds.
3. A countdown timer shows 1 minute and 45 seconds remaining. How many seconds is that in total?
105 seconds
1 × 60 = 60 seconds, plus 45 seconds = 105 seconds.
4. A countdown timer shows 1 minute and 5 seconds remaining. How many seconds is that in total?
65 seconds
1 × 60 = 60 seconds, plus 5 seconds = 65 seconds.
5. A countdown timer shows 6 minutes and 50 seconds remaining. How many seconds is that in total?
410 seconds
6 × 60 = 360 seconds, plus 50 seconds = 410 seconds.
6. A countdown timer shows 3 minutes and 35 seconds remaining. How many seconds is that in total?
215 seconds
3 × 60 = 180 seconds, plus 35 seconds = 215 seconds.
7. 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.
8. A countdown timer shows 2 minutes and 40 seconds remaining. How many seconds is that in total?
160 seconds
2 × 60 = 120 seconds, plus 40 seconds = 160 seconds.
9. 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.
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 2 minutes and 25 seconds remaining. How many seconds is that in total?
145 seconds
2 × 60 = 120 seconds, plus 25 seconds = 145 seconds.
12. A countdown timer shows 13 minutes and 30 seconds remaining. How many seconds is that in total?
810 seconds
13 × 60 = 780 seconds, plus 30 seconds = 810 seconds.

12 questions · Seed 52 · Age guidance, not curriculum certification