lesson
10 Less Than a Two-Digit Number
Find the number that is 10 less than a given two-digit number using models or mental math.
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10 More and 10 Less Up to 120
4 lessons
Goal
Use place-value relationships to quickly find 10 more or 10 less than any number up to 120.
4 lessons
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Learning standards covered
111.3(b)(5)(C)Texas Essential Knowledge and Skills (TEKS) · Math · 1st Gradeuse relationships to determine the number that is 10 more and 10 less than a given number up to 120;
Open Global Standard:OGM.2.NBT.3
111.3(b)(1)(A)Texas Essential Knowledge and Skills (TEKS) · Math · 1st Gradeapply mathematics to problems arising in everyday life, society, and the workplace;
Open Global Standard:OGM.2.MP.1
OGM.2.NBT.3OGM.2.MP.1