Q4 of 95 Page 83

Compute the following differences:

(11.3 × 10.7) – (11.7 × 10.3)

(11.3 × 10.7) can be written as (11+0.3)(11-0.3)

using identity -


(11+0.3)(11-0.3) = -


= 121 - 0.09


= 120.91


now (11.7 × 10.3) can be written as (11+0.7)(11-0.7)


using identity -


(11+0.7)(11-0.7) = -


= 121 - 0.49


= 120.51


now putting values in question


(11.3 × 10.7) – (11.7 × 10.3) = 120.91- 120.51


= 0.40


More from this chapter

All 95 →
4

Compute the following differences:

(10.3 × 9.7) – (10.7 × 9.3)

 4

Compute the following differences:

(11.3 × 10.7) – (11.7 × 10.3)

 1

Mark four numbers forming a square in a calendar:


Add the squares of the diagonal pair and find the difference of these sums:


42 + 122 = 160


112 + 52 = 146


160 – 146 = 14


Do this for other four numbers.

 1

Mark four numbers forming a square in a calendar:


Add the squares of the diagonal pair and find the difference of these sums:


42 + 122 = 160


112 + 52 = 146


160 – 146 = 14


Do this for other four numbers.