Question 2 (Page number 14) - Patterns in Products - Chapter 1 Class 7 - Large Numbers Around us (Ganita Prakash)

Transcript

Question 2 Find quick ways to calculate these products: Calculate these products quickly. (a) 25 × 12 = 25 × 12 = 𝟏𝟎𝟎/𝟒 × 12 = 100 × 3 = 300 Question 2 Find quick ways to calculate these products: Calculate these products quickly. (b) 25 × 240 = 25 × 240 = 𝟏𝟎𝟎/𝟒 × 240 = 100/4 × 24 × 10 = 100 × 6 × 10 = 6,000 Question 2 Find quick ways to calculate these products: Calculate these products quickly. (c) 250 × 120 = 250 × 120 = 25 × 10 × 12 × 10 = 25 × 12 × 100 = 𝟏𝟎𝟎/𝟒 × 12 × 100 = 100 × 3 × 100 = 30,000 Question 2 Find quick ways to calculate these products: Calculate these products quickly. (d) 2500 × 12 = 2500 × 12 = 25 × 100 × 12 = 25 × 12 × 100 = 𝟏𝟎𝟎/𝟒 × 12 × 100 = 100 × 3 × 100 = 30,000 Question 2 Find quick ways to calculate these products: Calculate these products quickly. (e) _____ × _____ = 120000000 _____ × _____ = 120000000 12 × 1,00,00,000 = 120000000