Vocabulary
The numbers 1-9 are _____.
ones
300+400=
700
335+116=
451
129+197=
326
There are 247 red cars. There are 438 black cars. How many red and black cars are there in all?
685 cars
The numbers 10-99 are ___.
tens
235+100=
335
194+333=
527
239+375=
614
A forest has 132 pine trees and 191 oak trees. How many trees are there in all?
323 trees
The numbers 100-999 are _________.
hundreds
370+10=
380
135+219=
354
362+264=
626
One karate class has 156 students. The other karate class has 176 students. How many students are in both karate classes?
332 students
When you ______, you take a number apart and write it in a new way.
regroup
178+100=
278
736+170=
906
556+148=
704
There are 153 yellow houses and 168 blue houses in the neighborhood. How many yellow and blue houses are there in all?
321 houses
The value given to a digit by its place in a number is its ___________.
place value
600+10=
610
425+148=
573
654+286=
940
red and green