1. Lesson Quizzes
Standard Lesson Quiz
Lesson Quiz for Student Response Systems

2. Lesson Quiz: Part I
Add. Estimate to check whether your answer is reasonable.
2. – (–19.2) 1.
21.25; Estimate: = 21
–27.66; Estimate: -8 + (-19) = -27
Subtract. Estimate to check whether your answer is reasonable.
6.72 – 4.16
4. 24 – 3.8 3.
2.56; Estimate: 7 – 4 = 3
20.2; Estimate: = 20

3. Lesson Quiz: Part II
Subtract. Estimate to check whether your answer is reasonable.
5. Renee finished her first lap in the 200 m freestyle
event in seconds. She completed the second lap in seconds. By how much did her time increase in the second lap? Estimate to check whether your answer is reasonable.
1.41 seconds; Estimate: 30 – 29 = 1

4. Lesson Quiz for Student Response Systems
1. Identify the sum and then estimate to check whether the answer is reasonable.
A ; estimate: = 20
B ; estimate: = 20
C ; estimate: = 19
D ; estimate: = 19

5. Lesson Quiz for Student Response Systems
2. Identify the sum and then estimate to check whether the answer is reasonable.
– (–18.1)
A. –8.78; estimate: –9 + (–18) = –9
B. –27.42; estimate: –9 + (–18) = –9
C. –27.42; estimate: –9 + (–18) = –27
D. –8.78; estimate: –9 + (–18) = –27

6. Lesson Quiz for Student Response Systems
3. Identify the difference and then estimate to check whether the answer is reasonable.
7.63 – 3.25
A. 4; estimate: 7 – 3 = 4
B. 4.22; estimate: 7 – 3 = 4
C. 4.32; estimate: 8 – 3 = 5
D. 4.38; estimate: 8 – 3 = 5

7. Lesson Quiz for Student Response Systems
4. Identify the difference and then estimate to check whether the answer is reasonable.
35 – 2.7
A. 32; estimate: 35 – 3 = 32
B. 32.3; estimate: 35 – 3 = 32
C. 33; estimate: 35 – 2 = 33
D. 33.3; estimate: 35 – 2 = 33

8. Lesson Quiz for Student Response Systems
5. Margaret took an exam that has two parts. She completed the first part in minutes and the second part in minutes. By how much did her time increase in the second part? Estimate to check whether the answer is reasonable.
A. 16 min; estimate: 33 – 17 = 16
B min; estimate: 32 – 17 = 15
C min; estimate: 32 – 18 = 14
D. 10 min; estimate: 30 – 20 = 10