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1.RA.A.3 Develop the meaning of the equal sign and determine if equations involving addition and subtraction are true or false. 1.RA.A.4 Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.
Solve problems that call for addition of three whole numbers whose sum is within 20.
1.NBT.A.1 Understand that 10 can be thought of as a bundle of 10 ones – called a “ten”.
1.NBT.A.2 Understand two-digit numbers are composed of ten(s) and one(s).
Add within 100.
Add or subtract a multiple of 10 from another two-digit number, and justify the solution.
1.GM.B.5 Order three or more objects by length.
1.GM.B.6 Compare the lengths of two objects indirectly by using a third object.
Education Galaxy’s The Missouri Learning Standards (MLS) mastery program provides online assessment and practice for students in Grades K-6 to help build mastery towards the Missouri Learning Standards. Our unique online program is easy to use and enjoyable for both teachers and students. Students work on their Study Plans practicing important concepts while teachers pull formative assessment reports to identify the strengths and weaknesses of their classroom and individual students.
