304.
Write the algebraic expression.
‘A plus 7’ can be written as
A+7 .
305.
Write the algebraic expression.
‘16 plus B’ can be written as
16 + B
.
308.
Write the algebraic expression.
‘10 multiplied by E’ can be written as
10E .
309.
Write the algebraic expression.
‘F multiplied by 16’ can be written as
16F .
310.
Write the algebraic expression.
‘G divided by 5’ can be written as
311.
Write the algebraic expression.
.
‘18 divided by H’ can be written as
.
313.
Write the algebraic expression.
‘Divide the sum of K and 3 by 4’ can be written as
.
314.
Write an algebraic expression and find the value of A mentally.
Jimmy has 10 marbles. Jenny has A marbles. They have 28 marbles balls
altogether.
Algebraic expression:
A=
18
10  A = 28 ;
.
315.
Write an algebraic expression and find the value of B mentally.
Sammy has B dollars. David has 4 dollars more than Sammy. David has
19 dollars.
Algebraic expression:
B=
15
.
B  4 = 19 ;
318.
Write an algebraic expression and find the value of E mentally.
A pack of instant noodles weighs E grams. 5 packs of instant noodles
weigh 600 grams.
Algebraic expression:
E=
120
5E = 600 ;
.
319.
Write an algebraic expression and find the value of F mentally.
A box of drawing pins contains 50 pieces. F boxes contain 300 pins.
Algebraic expression:
F=
6
50F = 300 ;
.
320.
Write an algebraic expression and find the value of G mentally.
Mr. Lam spent 100 dollars on G boxes of ice cream. Each box costs 25
dollars.
Algebraic expression:
;
G=
4
.
321.
Write an algebraic expression and find the value of H mentally.
May divided H beads into 12 equal parts. Each part has 6 beads.
Algebraic expression:
H=
72
;
.
322.
Write an algebraic expression.
A mango costs a dollars. 8 mangos cost altogether
8a
dollars.
323.
Write an algebraic expression.
A piece of bread costs 3 dollars.
y pieces of bread cost altogether
3y
dollars.
324.
Write an algebraic expression.
A roll of ribbon is 2 metres long. d rolls of ribbon are altogether
2d
metres long.
325.
Write an algebraic expression.
A rectangle is a cm long and b cm wide. Its area is
ab
cm2.
326.
Write an algebraic expression.
There are 20 red balloons and T yellow balloons.
There are altogether
(20 + T)
balloons.
330.
Write an algebraic expression.
There are 5 cocks and P hens in a farm.
There are altogether
(5  P)
chickens.
331.
Write an algebraic expression.
There are M tropical fish in a tank. There are 8 more goldfish than
tropical fish. There are
(M  8)
332.
Write an algebraic expression.
goldfish in the tank.
There are 2 pots of orchid. There are N more pots of camellia than orchid.
There are
(2  N)
pots of camellia.
336.
Write an algebraic expression.
N scouts are exactly divided into 5 rows evenly.
There are
scouts in each row.
337.
Write an algebraic expression.
The perimeter of a square is A cm. The length of its side is
cm.
338.
Write an algebraic expression.
There are W cherries. They are exactly divided into bags of ten each.
There are
cherries in each bag.
339.
Write an algebraic expression.
Some pupils made G red flags. The number of red flags is 2 times that of
yellow flags. They have made
yellow flags.
340.
Write an algebraic expression.
There are altogether K pairs of socks in 3 boxes.
There are
pairs of socks in each box on average.
341.
Write an algebraic expression.
There are altogether
(L + 2)
342.
Write an algebraic expression.
pieces of chocolates.
This orange weighs
(M + 20)
g.
344.
Write an algebraic expression.
Each toy car weighs
kg on average.
346.
Write an algebraic expression.
There are altogether
2U
paper clips.
347.
Write an algebraic expression.
Each diamond weighs
grams on average.
348.
Write an algebraic expression.
There are altogether
(2W + 3)
sausages.
814. Find the value of each of the letters mentally and link them to the
answers.
6 + B = 12
C–2=8
4  F = 20
28  H = 4
820. Write an algebraic expression and find the value of C mentally.
Each cat lead is C cm long. A dog lead is 6 cm longer than a cat lead. A
dog lead is 19 cm long.
Algebraic expression:
C=
13
C+6
=
19 ;
.
822. Write an algebraic expression and find the value of B mentally.
A piece of bone cost 10 dollars at first. It is on sale and is B dollars
cheaper. It now costs 8 dollars.
Algebraic expression:
B=
2
10 – B
=
8 ;
.
823. Write an algebraic expression and find the value of F mentally.
A can of cat food costs F dollars. 3 cans cost 60 dollars altogether.
Algebraic expression:
F=
20 .
3F
=
60 ;
825. What does each child say? Write the algrbraic expressions.
JUICY CANDIES
Each bottle
contains C candies
(a)
I have one bottle and 4 juicy candies. I have
altogether (
(b)
C
+
4
) candies.
I have one bottle of juicy candies. I ate 3 of
them. I still have (
(c)
C–3
) candies.
I have 6 bottles of juicy candies. I have
altogether
6C
candies.
826. Write an algebraic expression by observing the picture.
2 litres
S litres
There are altogether
(2 + S)
litres of soft drinks.
827. Write an algebraic expression by observing the picture.
Pg
100 g
weighs
(P – 100)
grams.
828. Write an algebraic expression by observing the picture.
Each packet contain B
pieces of biscuits.
There are altogether
4B
pieces of biscuits.
830. Write the algrbraic expression for each question.
(a) D plus 4
(b) 13 plus F
D
+
13 + F
4
831. Write the algrbraic expression for each question.
(a) T minus 6
(b) Subtract G from 8
T
–
6
8–G
832. Write the algrbraic expression for each question.
(a) 12 multiplied by R
(b) S multiplied by 5
12 R
5S
833. Write the algrbraic expression for each question.
(a) 24 divided by V
24
V
(b) W divided by 3
984. Write the algrbraic expression for each question.
(a) m plus 18
m + 18 or 18 + m
(b) The sum of 16 and n
16 + n or n + 16
985. Write the algrbraic expression for each question.
(a) Subtract k from 13
13 – k
p – 17
(b) p minus 17
986. Write the algrbraic expression for each question.
(a) A multiplied by 34
34A
(b) B times 26
26B
987. Write the algrbraic expression for each question.
(a) 42 divided by g
(b) Y divided by 18
988. Look at the picture and fill in the blanks.
Apple
$ 238
Orange
$M
(a) A box of apples costs $
A box of oranges costs $
A box of oranges is $
Pear
$N
238 .
M .
(M – 238)
more expensive than that of
apples.
(b) A box of pears costs $
A box of apples costs $
N .
238 .
The total cost to buy one box each is $
(N + 238)
.
(c) A hawker divides a box of oranges into 14 bags equally. The cost of
each bag is $
.
(d) The cost of a box of mangos is 3 times that of pears. A box of
mangos costs $
3N .
989. Fill in the blanks with appropriate algebraic expressions. (Only one
algebraic symbol can be used for all algebraic expressions.)
There are 148 chickens in a farm.
x
of them are hens. The remaining are cocks.
(148 – x)
There are
cocks in the farm.
Accept any reasonable algebraic symbols or algebraic expressions
990. Fill in the blanks with appropriate algebraic expressions. (Only one
algebraic symbol can be used for all algebraic expressions.)
A can of milk power can make 32 glasses of
milk after adding water. If each glass of milk
contains
x
mL, a can of milk power
can make altogether
32x
mL of milk.
Accept any reasonable algebraic symbols and algebraic expressions
991. Fill in the blanks with appropriate algebraic expressions. (Only one
algebraic symbol can be used for all algebraic expressions.)
A pencil case costs 16 dollars.
It is
x
dollars cheaper than a pencil box.
A pencil box costs
(16 + x)
dollars.
Accept any reasonable algebraic symbols and algebraic expressions
992. Look at each value d represents. Complete the table below.
d
0
1
2
3
4
5
6
7
8
9
(a)
d+8
8
9
10
11
12
13
14
15
16
17
(b)
31 – d
31
30
29
28
27
26
25
24
23
22
(c)
12d
0
12
24
36
48
60
72
84
96
108
993. Fill in the blanks with appropriate algebraic expressions. (Only one
algebraic symbol can be used for all algebraic expressions.)
A dozen of pencils cost
x
dollars.
One pencil costs
dollars.
Accept any reasonable algebraic symbols and algebraic expressions
994. List the equation based on the information given and then find the
weight of each kind of fruit.
weighs 235 grams.
(a)
weighs R grams,
Equation: R + 48 = 235
is 48 grams heavier than
weighs
(b)
187
.
Equation: P – 313 = 187
weighs P grams,
weighs
500
The weight of
(d)
.
weighs
500
Equation: 2M = 500
is 2 times that of
250
.
M=
250
grams.
W
Equation: 8 = 250
weighs W grams,
The weight of
P=
grams.
weighs M grams,
weighs
187
grams.
is 313 grams lighter than
(c)
R=
is 1 of
8
2000
grams.
.
W=
2000