Q3 of 20 Page 43

If the product of two whole numbers is 1, can we say that one or both of them will be 1? Justify through examples.

If the product of two numbers is 1, then both the numbers need to be 1.


Example -


1×1 = 1


However, if only one number is 1 then,


Example –


1×9 = 9


So,


We can say that the product of two whole numbers is 1 only when, both 1.


More from this chapter

All 20 →
1

Which of the following will not represents zero:

(a) 1 + 0 (b) 0 × 0


(c) (d)

2

If the product of two whole numbers is zero, can we say that one or both of them will be zero? Justify through examples.

 4

Find using distributive property:

(a) 728 × 101 (b) 5437 × 1001


(c) 824 × 25 (d) 4275 × 125


(e) 504 × 35.

 5

Study the pattern:


1× 8 + 1 = 9


12 × 8 + 2 = 98


123 × 8 + 3 = 987


1234 × 8 + 4 = 9876


12345 × 8 + 5 = 98765


Write the next two steps. Can you say how the pattern works?