3B · Chapter 14 · consolidation
Practice A
Original cumulative chapter practice to consolidate taught ideas.
Original cumulative chapter practice to consolidate taught ideas. Solutions are available as revealable feedback and in a separate complete answer key. No answer submissions or accounts are required.
Assessment · 18 questions
Questions
Show your thinking; use diagrams when they help. Do not open solutions during your first attempt.
- A1
Express 75 seconds in minutes and seconds.
Reveal explanation
Answer: 1 min 15 s
Group the 75 seconds into complete 60-second minutes, then count the 15 remaining seconds.
- A2
How many minutes pass from 12:35 p.m. to 1:50 p.m.?
Reveal explanation
Answer: 75 min
Count from 12:35 p.m. to the next whole hour, then onward to 1:50 p.m.. The intervals add to 75 minutes.
Analog clock showing 12:35 p.m.. - A3
Express 12 days in weeks and days.
Reveal explanation
Answer: 1 weeks 5 days
One week is seven days. 12 = 7 × 1 + 5.
- A4
How many minutes pass from 4:35 p.m. to 6:05 p.m.?
Reveal explanation
Answer: 90 min
Count from 4:35 p.m. to the next whole hour, then onward to 6:05 p.m.. The intervals add to 90 minutes.
Analog clock showing 4:35 p.m.. - A5
Convert 2 h 5 min into minutes.
Reveal explanation
Answer: 125 min
Each hour is 60 minutes. 2 × 60 + 5 = 125 minutes.
- A6
How many minutes pass from 9:50 a.m. to 10:40 a.m.?
Reveal explanation
Answer: 50 min
Count from 9:50 a.m. to the next whole hour, then onward to 10:40 a.m.. The intervals add to 50 minutes.
Analog clock showing 9:50 a.m.. - A7
Express 155 minutes in hours and minutes.
Reveal explanation
Answer: 2 h 35 min
There are 2 full groups of 60 minutes and 35 more minutes.
- A8
How many minutes pass from 12:45 p.m. to 1:35 p.m.?
Reveal explanation
Answer: 50 min
Count from 12:45 p.m. to the next whole hour, then onward to 1:35 p.m.. The intervals add to 50 minutes.
Analog clock showing 12:45 p.m.. - A9
Convert 1 min 35 s into seconds.
Reveal explanation
Answer: 95 s
Each minute contains 60 seconds. 1 × 60 + 35 = 95 seconds.
- A10
How many minutes pass from 12:20 p.m. to 1:50 p.m.?
Reveal explanation
Answer: 90 min
Count from 12:20 p.m. to the next whole hour, then onward to 1:50 p.m.. The intervals add to 90 minutes.
Analog clock showing 12:20 p.m.. - A11
Express 215 seconds in minutes and seconds.
Reveal explanation
Answer: 3 min 35 s
Group the 215 seconds into complete 60-second minutes, then count the 35 remaining seconds.
- A12
How many minutes pass from 7:40 a.m. to 8:15 a.m.?
Reveal explanation
Answer: 35 min
Count from 7:40 a.m. to the next whole hour, then onward to 8:15 a.m.. The intervals add to 35 minutes.
Analog clock showing 7:40 a.m.. - A13
Express 21 days in weeks and days.
Reveal explanation
Answer: 3 weeks 0 days
One week is seven days. 21 = 7 × 3 + 0.
- A14
How many minutes pass from 9:30 a.m. to 11:45 a.m.?
Reveal explanation
Answer: 135 min
Count from 9:30 a.m. to the next whole hour, then onward to 11:45 a.m.. The intervals add to 135 minutes.
Analog clock showing 9:30 a.m.. - A15
Convert 4 h 45 min into minutes.
Reveal explanation
Answer: 285 min
Each hour is 60 minutes. 4 × 60 + 45 = 285 minutes.
- A16
How many minutes pass from 7:50 a.m. to 9:40 a.m.?
Reveal explanation
Answer: 110 min
Count from 7:50 a.m. to the next whole hour, then onward to 9:40 a.m.. The intervals add to 110 minutes.
Analog clock showing 7:50 a.m.. - A17
A trip begins at 11:50 p.m. and lasts 50 minutes. On which day does it finish and at what time?
Reveal explanation
Answer: Next day at 12:40 a.m.
10 minutes reach midnight; 40 minutes more reach 12:40 a.m. on the next day.
- A18
Why is 4 hours 15 minutes not 415 minutes?
Reveal explanation
Answer: 255 minutes
Each hour has 60 minutes, so 4 hours 15 minutes is 240+15=255 minutes.