Practice the problems of Math in Focus Grade 4 Workbook Answer Key Chapter 7 Decimals to score better marks in the exam.
Math in Focus Grade 4 Chapter 7 Answer Key Decimals
Put On Your Thinking Cap!
Challenging Practice
Mark ✗ to show where each decimal is located on the number line. Label its value.
Question 1.
1.2
Answer:
Explanation:
0 + 0.4 = 0.4.
0.4 + 0.4 = 0.8.
0.8 + 0.4 = 1.2.
Question 2.
0.12
Answer:
Explanation:
0 + 0.03 = 0.03.
0.03 + 0.03 = 0.06.
0.06 + 0.03 = 0.09.
0.09 + 0.03 = 0.12.
Write any decimal that is
Question 3.
greater than 2 but less than 2.1 _____
Answer:
Greater than 2 but less than 2.1 = 2.987.
Explanation:
Greater than 2 but less than 2.1 = 2.987.
Question 4.
greater than 1.1 but less than 1.2. _____
Answer:
Greater than 1.1 but less than 1.2 = 1.1987.
Explanation:
Greater than 1.1 but less than 1.2 = 1.1987.
Round 9.95 to
Question 5.
the nearest whole number. _____
Answer:
The nearest whole number of 9.95 = 10.
Explanation:
The nearest whole number of 9.95 = 10.
Question 6.
the nearest tenth. _____
Answer:
The nearest tenth of 9.95 = 10.
Explanation:
The nearest tenth of 9.95 = 10.
Put On Your Thinking Cap!
Problem Solving
The decimals in each exercise follow a pattern.
Write the two missing decimals in each pattern.
Question 1.
0.01 0.14 ___ 0.4 ___ 0.66
Answer:
0.01 0.14 0.26 0.40 0.53 0.66.
Explanation:
0.01 0.14 0.26(0.4 – 0.14) 0.40 0.53(0.13 + 0.4) 0.66.
0.14 – 0.01 = 0.13.
0.4 – 0.14 = 0.26.
0.4 + 0.13 = 0.53.
0.53 + 0.13 = 0.66.
Question 2.
1.21 1.42 ___ 1.84 2.05 _____
Answer:
1.21 1.42 1.63 1.84 2.05 2.26.
Explanation:
1.21 1.42 1.63(1.42 – 1.21 = 0.21+ 1.42 ) 1.84 2.05 2.26(2.05 + 0.21)
1.42 – 1.21 = 0.21.
1.42 + 0.21 = 1.63.
1.63 + 0.21 = 1.84.
1.84 + 0.21 = 2.05.
2.05 + 0.21 = 2.26.
Question 3.
0.48 0.39 ___ 0.21 0.12 ____
Answer:
0.48 0.39 0.30 0.21 0.12 0.03.
Explanation:
0.48 0.39 0.30{(0.48 – 0.39) -0.39} 0.21 0.12 0.03(0.12 – 0.09).
0.48 – 0.39 = 0.09.
0.39 – 0.09 = 0.30.
0.12 – 0.09 = 0.03.
Question 4.
Answer:
Explanation:
Question 5.
0.01 0.02 0.04 0.07 0.11 ___ ____
Answer:
0.01 0.02 0.04 0.07 0.11 0.16 0.22.
Explanation:
0.01 0.02 0.04 0.07 0.11 0.16 (0.11 + 0.05) 0.19(0.16 + 0.04)
0.02 – 0.01 = 0.01.
0.04 – 0.02 = 0.02.
0.07 – 0.04 = 0.03.
0.11 – 0.07 = 0.04.
0.11 + 0.05 = 0.16.
0.16 + 0.06 = 0.22.
Question 6.
2.95 2.85 2.65 2.35 1.95 ___ ____
Answer:
2.95 2.85 2.65 2.35 1.95 1.45 0.85.
Explanation:
2.95 2.85 2.65 2.35 1.95 1.45(1.95 – 0.50) 0.85 (1.45 – 0.60)
2.95 – 2.85 = 0.10.
2.85 – 2.65 = 0.20.
2.65 – 2.35 = 0.30.
2.35 – 1.95 = 0.40.
1.95 – 0.50 = 1.45.
1.45 – 0.60 = 0.85.
Question 7.
0.38 0.4 0.36 0.38 0.34 ____ ____
Answer:
0.38 0.4 0.36 0.38 0.34 0.36 0.40.
Explanation:
0.38 0.4 0.36 0.38 0.34 0.36 0.40.
0.4 – 0.38 = 0.02.
0.4 – 0.36 = 0.04.
0.38 – 0.36 = 0.02.
0.38 – 0.34 = 0.04.
0.34 + 0.02 = 0.36.
0.36 + 0.04 = 0.40.
Question 8.
3.14 2.84 2.54 2.94 3.34 3.04 ___ ______
Answer:
3.14 2.84 2.54 2.94 3.34 3.04 2.74 3.14
Explanation:
3.14 2.84 2.54 2.94 3.34 3.04 2.74 3.14
3.14 – 2.84 = 0.30.
2.84 – 2.54 = 0.30.
2.94 – 2.54 = 0.40.
3.34 – 2.94 = 0.40.
3.34 – 3.04 = 0.30.
3.04 – 0.30 = 2.74.
2.74 + 0.40 = 3.14.