Grade 1 - The Number System
Standard 1.NS.1.10 - Complete the subtraction sentence by filling in the missing number with operands up to 18.
Included Skills: Subtraction
Students will be expected to use and describe strategies to determine sums and differences using manipulatives and visual aids. Strategies include • counting on or counting back • one more or one less • making ten • doubles • near doubles • Performance Indicators - N10.01 Use and describe a personal strategy to determine a sum. - N10.02 Use and describe a personal strategy to determine a difference. - N10.03 Use and describe how two different strategies can be used to determine a sum or difference.