Grade 1 - Number
Standard 1.N.10 - Compare addition equations to find the related fact with numbers up to 1000.
Included Skills: Addition, Number Properties
Describe and use mental mathematics strategies (memorization not intended), such as: counting on and counting back, making 10, doubles, using addition to subtract to determine basic addition facts to 18 and related subtraction facts. • Use and describe a personal strategy for determining a sum. • Use and describe a personal strategy for determining a difference. • Write the related subtraction fact for a given addition fact. • Write the related addition fact for a given subtraction fact.