Here is one way to make 14; 2 × ( 1 + 6) = 14. Are there other ways of getting 14? Fill them out below: Class 7

Here is one way to make 14; 2 × ( 1 + 6) = 14. Are there other ways of getting 14? Fill them out below: Class 7

Question 1.

Here is one way to make 14; 2 × ( 1 + 6) = 14. Are there other ways of getting 14? Fill them out below : Class 7

(a) _____× (_____+_____) = 14

(b) _____× (_____+_____) = 14

(c) _____× (_____+_____) = 14

(d) _____× (_____+_____) = 14

Solution:

(a) 2 × (2 + 5) = 14

(b) 2 × (3 + 4) = 14

(c) 1 × (4 + 10) = 14

(d) 1 × (3 + 11) = 14

Question 2.

Find out the sum of the numbers given in each picture below in at least two different ways. Describe how you solved it through expressions. Class 7

(a)

Solution:

484 + 848 + 484

= (484 + 848) + 484

= 1332 + 484 = 1816

Or 484 + 484 + 848

= 484 + 848 + 484

= 484 + (848 + 484)

= 484 + 1332 = 1816

Or 484 + 848 + 484 = 484 + 484 + 848

= (484 + 484) + 848

= 2 × 484 + 848

= 968 + 843 = 1816

(b)

Solution:

5665 + 6556 + 6556 + 5665

= 5665 + 5665 + 6556 + 6556

= 2 × 5665 + 2 × 6556

= 2 × (5665 + 6556)

= 2 × 12221 = 24442

Or 5665 + 6556 + 6556 + 5665

= (5665 + 6556) + (5665 + 6556)

=12221 + 12221

= 2 × 12221 = 24442