Chapter 10
Time
Q.1 Fill in the blanks :
1.
There are 24 hours in a day.
2.
There are 7 days in a week.
3.
There are 84 days in 12 weeks
4.
There are 365 days in a year.
5.
There are 366 days in a leap year.
6.
There are 29 days in February in a leap year.
Q.2 Write the following times in number:
1.
Half past 7
=
7:30
2.
25 minutes past 2
=
2:25
3.
15 minutes past 4
=
4:15
4.
10 minutes to 8
=
7:50
5.
20 minutes to 6
=
5:40
Q.3
Write the time in a.m. or p.m.
1.
11:15 in the morning
Ans: 11:15 a.m.
2.
5:50 in the evening
Ans: 5:50 p.m.
3.
4:20 in the night
Ans : 4:20 a.m.
4.
2:50 after noon
Ans: 2.50 p.m.
Q.4. Convert the following :
1.
4 days into hours
Ans: since 1 day =
24 hours
7
∴
∴
2.
4 days
4 days
=
=
24x4 hours
96 hours
20 minutes into seconds.
Ans: since 1 minute = 60 seconds
=
60x20 seconds
∴ 20 minutes
=
1200 seconds
∴ 20 minutes
Q.5. How many minutes are there in 1 day ?
Ans : Since 1 day = 24 hours
And 1
hour = 60 minutes
∴ No. of minutes in 1 day = 60 x 24
60 x 24 240
120x 1440
∴ No. of minutes in 1 day = 1440
Mental Maths
Fill in the boxes :
1.
Time when the minute hand is at 6 and hour hand is between
3 and 4
[
]
2.
2 weeks 5 days
3.
12:50 after noon can be written as
[
4.
Seconds are there in 5 minutes [
]
5.
Months are there in 9 years
]
[
] days
[
]
CHAPTER 09
MONEY
WRITING RUPEES AND PAISE
The amount of money can be written in two ways :
In words and in figures –
3.50or 3 rupees 50 paise in words.
CONVERTING RUPEES INTO PAISE
1 Rupee = 100 Paise
To convert rupee into paise, multiply the amount in rupees by 100. Write P for paise at the end.
For example :
2 = 2 x 100 = 200 p
CONVERTING PAISE INTO RUPEES
To convert paise into rupees, divide the amount in paise by 100 or count two digits from right and put a
dot there. Write
at the beginning.
ADDITION OF MONEY
Q–
+
Steps 2
3 .5 0
1. Arrange in
and paise
1
1 . 2 5
2. Write in columns such that the dots are exactly one below the other.
3
5 . 5 0
3. Add the paise first and then rupees.
7
0 . 2 5
SUBSTRACTION OF MONEY
9 0 . 0 0
Steps -
7 0 .2 5
1. Arrange in
1 9 .7 5
and p.
2. Write in columns such that the dots are exactly one below the other.
3. Substract the paise first and then the rupees.
MULTIPLICATION OF MONEY
8 0 . 0 0
X
3
2 4 0 .0 0
Steps 1. Arrange in
and p.
2. Multiply 80 by 3 as normally do.
3. Write
.
4. Put the dot before the second digit from the right.
DIVISION OF MONEY
9 6 . 0 0
÷
Steps -
8
1. Arrange in
1 2 .0 0
and p.
2. Divide 96 by 8 as normally do.
3. Write
.
4. Put the dot before the second digit from the right.
MENTAL MATHS
Q1. 900p = ________
Q2.
8.00 = _______
Q3. A box of 4 balls costs
48. What is the cost of each ball?
Q4.
60.00 +
13.55 = ____________
Q5.
35.20 -
23.65 = ____________
CHAPTER 10
FRACTIONS
A fraction is a part of a whole .It is also a part of collection.
WHOLE
½
½
LIKE AND UNLIKE FRACTIONS
LIKE FRACTIONS – Fractions which have the same denominators are
called like fractions .
¼ , 2/4 , ¾
For eg-
UNLIKE FRACTIONS –Fractions which have different denominators are
called unlike fractions .
For eg-
½,2/3,4/5
COMPARISON OF LIKE FRACTIONS
When two fractions have the same denominator , then the fraction with the
greater numerator is greater.
For eg-¾> 2/4
EXERCISE
Q.1. Circle the like fractions:
1. 2/4,1/5,3/4,4/6
2. 2/5,1/3,3/4,3/5
3. 4/6,2/3,4/6,1/4
Q.2. Circle the greater fraction:
1. ¼,
¾
2. 7/9,8/9
Q.3. Arrange the given fraction in ascending order :
1. 4/,4/6,1/6,2/6,5/6,3/6
2. 2/8,4/8,5/8,3/8
Q.4. solve the following :
1. 2/5+3/5
2.7/8-4/8
3. 1/7 of 56
Q.5. Put the correct sign
1. ¼ ---- 7/4
2. 5/7-----7/7
3. 7/8 -----4/8
MENTAL MATHS
1. Fraction in which the denominator is 27 and
numerator is 19 =------------2. Half of 500= --------.
3. Fraction 11/20 in words = --------------4. The sum of 9/21 and 3/21 =-----------5. The difference of 3/8 and 7/8 = -----6. Seven-fiftieth in numbers = --------7. Numerator of 31/95 = -----------8. One – fourth of 100 = ---------- .
9. Half of half = -------------.
Chapter 11
Data Handling
Q.I.
The given pictograph shows the no. of mangoes sold by a
Fruit vendor in five days of a week. Read the pictograph
And answer the following questions.
Days
No. of mangoes
Monday
δ
δ
δ
Tuesday
δ
δ
δ
Wednesday
δ
δ
Thursday
δ
δ
δ
Friday
δ
δ
δ
δ
δ
δ
δ
One δ stands for 10 mangoes.
Q.1
On which day, mangoes are sold maximum ?
Ans : Monday
Q.2.
On which day mangoes are sold minimum ?
Ans: Wednesday
Q.3.
How many mangoes are sold on Tuesday ?
Ans: 30
Q.4.
How many mangoes are sold on Thursday?
Ans : 40
Q.5.
How many mangoes are sold in all ?
Ans : 180
Q.II.
The following information shows the no. of girls who like
Different fruits.
Apple
21
Mango
24
Orange
16
Papaya
26
Represent this information by Tally marks.
Ans:
Fruits
No. of girls
Tally marks
Apple
21
llll llll llll llll l
Mango
24
llll llll llll llll llll
Orange
16
llll llll llll l
Papaya
26
llll llll llll llll llll l
MENTAL MATHS
1. The pictograph given below displays the sports played by the class 3 students of
a school .
Sports played by class 3 students
FOOTBALL
λ
CRICKET
λ
λ
λ
BADMINTON
λ
λ
SWIMMING
λ
λ
KEY-: λ= 10 STUDENTS
λ
λ
λ
λ
λ
λ
λ
λ
λ
Use the pictograph to answer the following questions :
a) Which is the most popular sport amongst the class 3 students ?
b) Which is the least popular sport ?
c) How many more students play football than badminton ?
d) How many students play cricket ?
e) How many students are there in all in class 3 ?