More than Less than and Opposites Brooklyn Learning
More than, Less than and Opposites Brooklyn Learning Lab
Topics ▪ Ask a Question ▪ Solve a Puzzle: Meaning of the Equal Sign ▪ Five Cases of Comparison ▪ Problem Solve Comparisons ▪ Addition and Subtraction: “Opposites” Together
Ask a Question ▪ When you hear the words below what do you think about? ▪ A. More than ▪ B. Less than
Solve a Puzzle: Meaning of the Equal Sign In each box, choose either addition (+) or subtraction (-) to make the outcome equal on both sides. You can use the same operation more than once. ▪ 1. 10 6 = 20 ▪ 2. 9 7 = 12 4 10
Solve a Puzzle: Meaning of the Equal Sign In each box, choose either addition (+) or subtraction (-) to make the outcome equal on both sides. You can use the same operation more than once. ▪ 1. 16 15 = ▪ 2. 25 14 = 93 42 11 82
Solve a Puzzle: Meaning of the Equal Sign In each box, choose either addition (+) or subtraction (-) to make the outcome equal on both sides. You can use the same operation more than once. ▪ 1. 15 9 = ▪ 2. 17 4 = 21 4 2 8
Solve a Puzzle: Meaning of the Equal Sign In each box, choose either addition (+) or subtraction (-) to make the outcome equal on both sides. You can use the same operation more than once. ▪ 1. ___ = ___ ▪ 2. ___ = ___
More than or Less than: Bar Model ▪ 1. (a) ___? ___ more than 17 is 21. Draw Bar Model Below ▪ 1. (b) ___? ___ less than 17 is 13. Draw Bar Model Below
More than or Less than: Bar Model ▪ 2. (a) 6 more than ___? ___ is 23. Draw Bar Model below ▪ 2. (b) 4 less than ____? ___ is 13. Draw Bar Model Below
More than or Less than: Bar Model ▪ 3. (a)____? ____ is 8 more than 19. Draw Bar Model below ▪ 3. (b) ____? ____ is Draw Bar Model below 7 less than 21.
More than or Less than: Bar Model ▪ 4. (a) 25 is 7 more than ____? ____. Draw Bar Model Below ▪ 4. (b) 21 is 15 less than ____? ____. Draw Bar Model Below
More than or Less than: Bar Model ▪ 5. (a) 23 is ____? ____ more than 11. Draw Bar Model Below 5. (b) 19 is ____? ____ less than 8. Draw Bar Model Below
Problem: Solve using a Bar Model ▪ Jen has 13 fewer markers than Jane. If Jen has 19 markers. How many markers does Jane have? Draw Bar Model ▪ Jen has _____ markers. ▪ Jane has _____ markers.
Problem: Solve using a Bar Model ▪ Adam has 15 more marbles than Rick. If Adam has 19 marbles. How many marbles does Rick have? Draw Bar Model ▪ Adam has _____ marbles. ▪ Rick has _____ marbles.
Problem: Solve using a Bar Model ▪ Dan has 19 fewer pencils than Kurt. If Dan has 12 pencils. How many pencils does Kurt have? ▪ Dan has ______ pencils. ▪ Kurt has ______ pencils.
PART-TOTAL STORY PROBLEM: Use a Bar Model ▪ What number must be added to 304 to result in a sum of 198? Use a bar model to represent the problem and solve. ▪ Number sentence:
Subtraction and Addition: “Opposites” Together ▪ A. addend + addend = sum ▪ 15 + 13 = 28 B. minuend – subtrahend = difference ▪ 28 – 15 = 13 Question: What do you notice? Think about part and total. How is addition different from subtraction? How is subtraction and addition related?
Subtraction and Addition: “Opposites” Together ▪ A. addend + addend = sum ▪ 15 + 13 = 28 13 + 15 = 28 B. minuend – subtrahend = difference ▪ 28 – 15 = 13 ▪ 28 – 13 = 15 Question: What do you notice? Think about part and total. How is subtraction different from addition? How is addition and subtraction related?
Subtraction and Addition: “Opposites” Together A. addend + addend = sum 14 + 19 = 33 Create a subtraction number sentence ▪ B. minuend – subtrahend = difference ▪ 43 – 22 =21 Create an addition number sentence
Subtraction and Addition: “Opposites” Together A. addend + addend = sum _____ + _____ = _____ Create a subtraction number sentence _____ - _____ = ______ ▪ B. minuend – subtrahend = difference ▪ _____ – _____ = _____ Create an addition number sentence ▪ _____ + _____ = _____
Subtraction and Addition: “Opposites” Together Solve to find the missing number. Create a new number sentence. ▪ A. addend + addend = sum ▪ 13 + ? = 31 ▪ B. minuend – subtrahend = difference ▪ 28 – ? = 16
Solve ▪ 59 + ______ = 103
Solve ▪ _____ - 43 = 102
Solve ▪ 69 + ____ = 105
Solve ▪ ____ - 29 = 84
Solve ▪ 31 + 54 = _______
Solve ▪ 91 - 47 = _______
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