Find the best tutors and institutes for Class 6 Tuition
Search in
Make up as many expressions with numbers (no variables) as you can from three numbers 5, 7 and 8. Every number should be used not more than once. Use only addition, subtraction and multiplication.
(Hint: Three possible expressions are 5 + (8 − 7), 5 − (8 − 7), (5 × 8) + 7;
make the other expressions.)
Many expressions can be formed by using the three numbers 5, 7, and 8.
Some of these are as follows.
5 × (8 − 7)
5 × (8 + 7)
(8 + 5) ×7
(8 − 5) ×7
(7 + 5) ×8
(7 − 5) ×8
Which out of the following are expressions with numbers only?
(a) y + 3 (b) (7 × 20) − 8z
(c) 5 (21 − 7) + 7 × 2 (d) 5
(e) 3x (f) 5 − 5n
(g) (7 × 20) − (5 × 10) − 45 + p
It can be observed that the expressions in alternatives (c) and (d) are formed by using numbers only.
Identify the operations (addition, subtraction, division, multiplication) in forming the following expressions and tell how the expressions have been formed.
(a) z + 1, z − 1, y + 17, y − 17 (b) 
(c) 2y + 17, 2y − 17 (d) 7m, − 7m + 3, − 7m − 3
(a) Addition as 1 is added to z.
Subtraction as 1 is subtracted from z.
Addition as 17 is added to y.
Subtraction as 17 is subtracted from y.
(b) Multiplication as y is multiplied with 17.
Division as y is divided by 17.
Multiplication as z is multiplied with 5.
(c) Multiplication and addition
y is multiplied with 2, and 17 is added to the result.
Multiplication and subtraction
y is multiplied with 2, and 17 is subtracted from the result.
(d) Multiplication as m is multiplied with 7.
Multiplication and addition as m is multiplied with −7, and 3 is added
to the result.
Multiplication and subtractionas m is multiplied by −7, and 3 is
subtracted from the result.
Give expressions for the following cases.
(a) 7 added to p (b) 7 subtracted from p
(c) p multiplied by 7 (d) p divided by 7
(e) 7 subtracted from − m (f) − p multiplied by 5
(g) − p divided by 5 (h) p multiplied by − 5
(a) p + 7
(b) p − 7
(c) 7p
(d) 
(e) − m − 7
(f) − 5p
(g) 
(h) − 5p
Give expressions in the following cases.
(a) 11 added to 2m
(b) 11 subtracted from 2m
(c) 5 times y to which 3 is added
(d) 5 times y from which 3 is subtracted
(e) y is multiplied by − 8
(f) y is multiplied by − 8 and then 5 is added to the result
(g) y is multiplied by 5 and the result is subtracted from 16
(h) y is multiplied by − 5 and the result is added to 16
(a) 2m + 11
(b) 2m − 11
(c) 5y + 3
(d) 5y − 3
(e) − 8y
(f) − 8y + 5
(g) 16 − 5y
(h) − 5y + 16
(a) Form expressions using t and 4. Use not more than one number operation. Every expression must have t in it.
(b) Form expressions using y, 2 and 7. Every expression must have y in it. Use only two number operations. These should be different.
(a) t + 4, t − 4, 4t, 
, 
, 4 − t, 4 + t
(b) 2y + 7, 2y − 7, 7y + 2,…
How helpful was it?
How can we Improve it?
Please tell us how it changed your life *
Please enter your feedback
UrbanPro.com helps you to connect with the best Class 6 Tuition in India. Post Your Requirement today and get connected.
Find best tutors for Class 6 Tuition Classes by posting a requirement.
Get started now, by booking a Free Demo Class
