Mental Math
47-20
27
What unit would you use to measure a pencil?
centimeters or inches
One pencil is 14 centimeters long.
Another pencil is 18 centimeters long.
How long are the pencils altogether?
32 centimeters long
24 centimeters is longer than 24 inches.
false
Does Abby like coffee?
NO!
47-24
23
A paperclip would probably be about 3 of these.
centimeters
A stick is 27 inches long.
It breaks and now is 19 inches long.
How many inches broke off?
8 inches
If something is measured in centimeters, the number is usually bigger than if it is measured in inches.
true
What is Becca's last name?
37+6
43
Both inches and centimeters can be found on this tool.
A ruler
A big book is 22 inches long.
A smaller book is 15 inches long.
How many inches longer is the big book?
7 inches
If one ribbon is 14 inches long and another is 16 inches long, the total length is 30 inches.
true
What is Becca's son named?
James
63-24
39
Would you use inches or centimeters to measure an ant? Why?
centimeters because ants are tiny!
A ribbon is 45 centimeters long.
First, 20 centimeters are cut off.
Then, 8 centimeters are cut off.
How long is the ribbon now?
17 centimeters
If a stick is 28 inches long and breaks to 19 inches, 9 inches broke off.
true
What is Abby's fiancé's name?
Reece
75-37
38
A caterpillar is 17 centimeters long.
A worm is 15 centimeters long.
What is their total length?
32 centimeters
One ruler is 10 centimeters long.
Another is 12 centimeters long.
The third is 18 centimeters long.
What is the total length of all three rulers?
40 inches long
A marker measured as 25 inches is a reasonable measurement.
false
What are the names of Becca AND Abby's cats?
Ichabod and Peanut