⏰ AINMATH · Classroom Worksheet

Minutes Before and After

Lower elementary · Time & Clocks ⏱ 15–20 min

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Learning goal — Understand that the hour changes when the minutes go over or under 60, and be able to find the time a certain number of minutes before or after.

💻 Access on a tablet → ainmath.com/clock-minutes-before-after.html

1What Time Will It Be After a Certain Number of Minutes?

① It's 3:20 right now. What time will it be in 25 minutes?

② It's 4:45 right now. What time will it be in 30 minutes?

③ It's 9:50 right now. What time will it be in 15 minutes?

2What Time Was It a Certain Number of Minutes Before?

① It's 2:10 right now. What time was it 40 minutes ago?

② It's 6:05 right now. What time was it 20 minutes ago?

3Think Further

Q. It's 4:40 right now. What time will it be in 50 minutes? (Hint: the hour might change twice!)

For teachers — cover before handing out to students

Answers & Solutions

Activity 1 — ① 3:20+25 min=3:45 ② 4:45+30 min=75 min→5:15 ③ 9:50+15 min=65 min→10:05

Activity 2 — ① 2:10−40 min: short by 10 min, so borrow 60 min from 1 o'clock: 70 min−40 min=30 min→1:30 ② 6:05−20 min: short by 5 min, so borrow 60 min from 5 o'clock: 65 min−20 min=45 min→5:45

Activity 3 — 4:40+50 min=90 min. 90 min is 60 min (1 hour)+30 min, so the hour moves to 5, leaving 30 min → 5:30.