Mental Math
101+74
175
David is 48 inches tall. His
younger brother is 35 inches tall.
What is the difference in their
heights?
48 - 35 = 13
MENTAL MATH
100-75
25
What time is is 
9:00
A library had 943 books.
Students borrowed 522 books.
How many books remain on the
shelves?
943 − 522 = 421
Mental Math
46+235=
281
A ribbon was 67 inches long.
Mia cut off 25 inches. How long is
the ribbon now?
67 - 25 = 42
MENTAL MATH
840-67
773
What does the short hand and the long hand mean on a clock
long hand = minutes
short hand = hours
If you add the fish, sea horses and jellyfish together, how many sea creatures are there in total?![]()
Mental Math
10+30+200
240
Tom found 34 seashells and his
sister found 45 seashells. How
many seashells did they find
together?
34 + 45 = 79
MENTAL MATH
984-763
221
on an empty clock show me the time 10:10

How many students came to school today
25
Mental Math
76+52
128
A factory produced 864
bottles. If 532 bottles were
shipped, how many remain?
864 − 532 = 332
MENTAL MATH
636-512=
124
Finish the clock 
55...00 
show me 6 groups of 5 and how many are there
30
Mental Math
270+50
320
A park had 132 visitors on
Saturday and 467 visitors on
Sunday. How many visitors came
on both days?
132 + 467 = 599
MENTAL MATH
900-780=
120
watching the sunset is AM or PM
PM
37 Ft