  # Missouri - Grade 1 - Math - Relationships and Algebraic Thinking - Number Sentences - 1.RA.A.3, 1.RA.A.4

### Description

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.

• State - Missouri
• Standard ID - 1.RA.A.3, 1.RA.A.4
• Subjects - Math Common Core

### Keywords

• Math
• Relationships and Algebraic Thinking

## More Missouri Topics Use addition and subtraction within 20 to solve problems. Use properties as strategies to add and subtract. 1.RA.B.6 Demonstrate that subtraction can be solved as an unknown-addend problem. 1.RA.C.7 Add and subtract within 20. 1.RA.C.8 Demonstrate fluency with addition and subtraction within 10. 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). Distinguish between defining attributes versus non-defining attributes; build and draw shapes that possess defining attributes.

## Here is the skill that Missouri requires you to master

• State Test MAP - Missouri Assessment Program
• State Standards Missouri Learning Standards
• Subject Math
• Topic Name Number Sentences
• Standard ID 1.RA.A.3, 1.RA.A.4
• Description
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.  