What is 230 + 10?
240
What is mental math?
When you solve a problem "in your head" without using pencil and paper.
Josias has 264 magnetic tiles. Genesis has 341 magnetic tiles. Who has less tiles?
Josias
AJ has 509 apples. Her brother has 507 apples. Who has more apples?
AJ
Solve.
747
Solve.
874
Solve.
948
What place value changes when we add 100 to a 3-digit number?
the hundreds place value
What place value changes when we add 10 to a 3-digit number?
the tens place value
Solve 345 + 100 =
445
Solve 410 + 10=
420
Solve 456 + 100 =
556
True or False: 567 + 10 = 667
False
True or False: 234 < 254
True
Solve 209 + 120 =
329
True or False: This equals 978.
False
