Find the value of each expression mentally.

1. Find the value of . Explain or show your reasoning.

2. Han uses the standard algorithm to subtract decimals. Describe what he does in each step.

   

3. Use the standard algorithm to find the value of .

1. Which whole number is the difference closest to? Explain or show your reasoning.
2. What is the value of ? Explain or show your reasoning.
3. Which whole number is the difference  closest to? Explain or show your reasoning.
4. What is the value of ? Explain or show your reasoning.

1. Find the value of . Explain or show your reasoning.

2. Elena and Andre try to find the value of . Who do you agree with? Explain or show your reasoning.

   

   Elena, Subtract. The two numbers are right aligned. 6 hundred 22 point 3 5, minus, 71 point 4, equals, 6 hundred 15 point 2 1.  Quote, my answer makes sense because 6 hundred 15 and 21 hundredths is less than 6 hundred 22 and 35 hundredths. Andre, Subtract. The two numbers are right aligned. 6 hundred 22 point 3 5, minus, 71 point 4 0, equals, 5 hundred fifty point 9 5. Quote, my answer makes sense because 6 hundred 20 minus seventy equals 5 hundred fifty. So my answer should be right around 5 hundred fifty.