DECIMAL FRACTIONS EXERCISE 3 (SOLUTION 91 TO 100)

1.      Given expression = 8 – 2.8/1.3 = 5.2/1.3 = 52/13=4.

2.      Given expression = 4.7 x (13.26 + 9.43 + 77.31) = 4.7 x 100 =470.

3.      Given expression = 0.2(0.2 + 0.02) /0.044 = 0.2 x 0.22/0.044 = 0.044/0.044 =1.

4.      Given expression = 8.6 x (5.3 +4.7)/4.3 x (9.7 -8.7) = 8.6x20/4.3 x1=20.

5.      Given expression =.896 x (.763 + .237)/.7x(064 +.936) = .896/.7 x 1 =8.96/7 =1.28.

6.      Given expression = (a² -b²) – (a + b (a – b) = (68.237 + 31.763) (68.237 – 31.763)

=(100 x 36.474) = 3647.4.

7.      Given expression = a² -b² / a - b = (a+ b) (a –b)/ (a-b) = (a + b) = (2.39 + 1.61) = 4.

8.      Given expression (2.644)² - (2.356)²/2.644 – 2.356 = a² - b²/a – b= ((a + b) = (2.39 + 1.61) = 4.

9.      Let (36.54)² - (3.46)²/X = 40. Then, X = (36.54)²/40 = (36.54)² -(3.46)²/36.54 + 3.46

= a² - b² /a + b = (a- b) = (36.54 – 3.46) = 33.08.

10.  Given expression = (67.542)² - (32.458)²/ (67.542 + 7.196) – (32.458 + 7.916)

= (67.542)² - (32.458)²/67.542 – 32.458 = (67.542 + 32.458) = 200.