Unit 9, Lesson 4
Another Look at the Standard Algorithm
Grade 4
Activity 1
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Find the value of each difference.
a.
b.
c.
d. -
Find the number that makes each expression true.
a.
b.
c.
d.
Activity 2
Priya and Han find the value of . They use 2 different methods to set up their calculations.
- Use both methods to find the difference of 20,000 and 472.
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Kiran uses another method. Explain how Kiran finds the value of .
- Which method do you prefer? Or do you prefer another way? Explain your reasoning.
- Find the value of . Show your reasoning.