Grade 4 - Arithmetic: Understanding and writing numbers
Standard 4.ARTU.1.1.5 - Choose numbers that result in a particular difference.
Included Skills: Subtraction
Composes and decomposes a natural number up to 100000 in a variety of ways (e.g. 123 = 100 + 23, 123 = 100 + 20 + 3, 123 = 50 + 50 + 20 + 3)