9.Write the formula : Simple Interest = (?!)
10.Express in km using decimals : 65 m
B.Answer to the following questions:
1. What is to be added to 63.58 to get 92. - 34.49
2. Find the difference: 7- 4 2/3
3.Find 4 rational numbers equivalent to : 6/11
4.Simplify :((-2/3)3)3
5.Find the product : 3a? x 8a4
6.A bus cover 62.5 Km in one hour .How much distance
7.By what number should 9 4/5 be multiplied to get 42
8.Arrange the following fractions imn ascending order
9.Simplify : (13/8 x12/13) x (-4/9 x3/-2)
10.Subract the sum of (8a - 6a? +9 ) and (-10a -8 + 8a
Answers
9- P × R × T, where P = Principal, R = Rate of Interest, and T = Time period. Here, the rate is given in percentage (r%) is written as r/100.
10- 1km=1000m
1m=1/1000km
here65m=65/1000
=0.065
B)
1- Let the unknown number be x.
X + 63.58 = 92
X = 92 - 63.58
X = 28.42
2- 7 – [ 4 (2/3)]
Convert mixed fraction into improper fraction, and then find the difference.
= [4(2/3)] = (14/3) = 7-(14/3) = (21-14)/3 = (7/3) = [2 (1/3)]
3- 12/22 , -18/33 , -24/44 , -30/55
4-
5- 3×8×a2×a4
24×a2+4
24×a6
24a6
6- Distance covered by bus in 1 hr=62.5 km
therefore the distance covered by bus in 18 hrs
=
(62.5×18) km
=1125 km
7- let assume the no. - x
x*94/5=42
x=42*5/94
x=21*5/47
x=105/47
8-
9- (13/8*12/13)+(-4/9*3/-2)
3/2+2/3
=13/6
10- 8a-6a²+9-10a-8+8a²)-(-3)
-2a+2a²-1+3
-2a+2a²+2
2(-a+a²+1)
Hope it helps you