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Missing Numbers in Subtraction—Let's Practice!

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Missing Numbers in Subtraction—Let's Practice!
CCSS.MATH.CONTENT.2.OA.A.1, CCSS.MATH.CONTENT.1.OA.A.2

Basics on the topic Missing Numbers in Subtraction—Let's Practice!

Today we are solving missing numbers in subtraction problems with Razzi! This video contains examples to help you further practice and grow confident in this topic.

Transcript Missing Numbers in Subtraction—Let's Practice!

Razzi says get these items ready (...) Because today we're going to practice... Missing Numbers in Subtraction. It's time to begin! Find the missing number in the number sentence... seventy-eight minus blank equals twenty-one. Rewrite the number sentence by moving twenty-one BEFORE the equal sign. Then solve seventy-eight minus twenty-one which equals fifty-seven. Check your answer by putting fifty-seven in the ORIGINAL number sentence. Did you also get seventy-eight minus fifty-seven equals twenty-one? Let's tackle the next problem! Ninety-three minus blank equals ten. Rewrite the number sentence by moving ten BEFORE the equal sign. Then solve ninety-three minus ten which equals eighty-three. Check your answer by putting eighty-three in the ORIGINAL number sentence. Did you also get ninety-three minus eighty-three equals ten? Let's try another! Blank minus twenty-two equals fifty-five. Since the first number is missing in the subtraction sentence, rewrite the number sentence as twenty-two PLUS fifty-five... then solve to get seventy-seven. Check your answer by putting seventy-seven in the ORIGINAL number sentence. Did you also get seventy-seven minus twenty-two equals fifty-five? Let's try one more! Blank minus eighty-nine equals two. Rewrite the number sentence as eighty-nine PLUS two... then solve to get ninety-one. Check your answer by putting ninety-one in the ORIGINAL number sentence. Did you also get ninety-one minus eighty-nine equals two? Razzi had so much fun practicing with you today! See you next time!