Practice the problems of Math in Focus Grade 4 Workbook Answer Key Chapter 7 Decimals to score better marks in the exam.

Challenging Practice
Mark ✗ to show where each decimal is located on the number line. Label its value.

Question 1.
1.2

Explanation:
0 + 0.4 = 0.4.
0.4 + 0.4 = 0.8.
0.8 + 0.4 = 1.2.

Question 2.
0.12

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 _____
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. _____
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. _____
The nearest whole number of  9.95 = 10.

Explanation:
The nearest whole number of  9.95 = 10.

Question 6.
the nearest tenth. _____
The nearest tenth of  9.95 = 10.

Explanation:
The nearest tenth of  9.95 = 10.

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
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 _____
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 ____
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.

Explanation:

Question 5.
0.01 0.02 0.04 0.07 0.11 ___ ____
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 ___ ____
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 ____ ____
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 ___ ______
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.