¡Hola amigos! Today we are going to our favorite Mexican restaurant to help the chef. We need at add and subtract to make sure we serve the right amount of food. In this lesson, students work to solve addition and subtraction word problems by utilizing a number line. Number lines are an excellent tool to help students visualize adding and subtracting larger numbers. They also help us count accurately. ¡Vamos a comer!
Identify keywords in word problems to understand which operation to use
Use a number line to accurately add and subtract numbers in word problems
Understand that adding means counting up on a number line and subtracting means counting back
Distinguish which number line is useful in solving certain problems
Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.