Lesson 12
Midnight to noon is 12 hours.
12 hours
+ 12 hours
Noon to the next midnight is 12 more
24 hours
hours.
One day is 24 hours.
Ask your teacher for help before you do the next exercise.
Mark the correct answer.
1. A day begins at
12:00 midnight
12:00 noon
2. From midnight to noon is
12 hours
24 hours
3. One day is
12 hours
24 hours
Solution
4. Grandma had 225 yards of thread on a spool.
If she has already used 114 yards of it on a quilt,
2 2 2 2 5 5
how much of the thread is left on the spool?
– – 1 1 1 1 4 4
1 1 1 1 1 1
yards
1 1 1 1 1 1
5
5.
1
4 1 8
1 3 7
5 9
4 3
2
– 3 0 1
+ 4 2 0
– 3 9
+ 4 2
+ 3
1 1 1 1 7 7
5 5 5 5 7 7
2 2 0 0
8 8 5 5
1 1 1 1
54