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Finding the Unknown Number (in Addition) — Let's Practice!

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Finding the Unknown Number (in Addition) — Let's Practice!
CCSS.MATH.CONTENT.1.OA.A.1

Transcript Finding the Unknown Number (in Addition) — Let's Practice!

Razzi says get a piece of paper and pencil ready (...) Because today we're going to practice... Finding the unknown number (in addition). It's time to begin! Remember, you can use parts, whole, and addition to help find the missing number. If Mr. Squeaks started with seven bits of wood for his new project, and ended up with twelve, how many bits did he add? Remember to write an equation, and fill in the parts that you know. Then, count up from part one until you reach the whole. How many numbers did you count? Did you also count five? So, the missing number is five! Let's tackle the next problem! Mr. Squeaks now has started building using screws. If he started with eight screws and finished with eleven, how many screws did he add? Remember to write an equation, and fill in the parts that you know. Then, count up from part one until you reach the whole. How many numbers did you count? Did you also count three ? So, the missing number is three! Let's tackle the next problem! If Mr. Squeaks has a pile of ten seeds and ends with a pile of sixteen seeds, how many seeds did he add? Remember to write an equation, and fill in the parts that you know. Then, count up from part one until you reach the whole. How many numbers did you count? Did you also count six ? The missing number is six! Razzi had so much fun practicing with you today! See you next time!