Contents

**Natural Numbers and Whole Numbers – Maharashtra Board Class 6 Solutions for Mathematics (English Medium)**

MathematicsGeneral ScienceMaharashtra Board Solutions

### Exercise-19

**Solution 1(1):**

**Solution 1(2):**

**Solution 1(3):**

**Solution 1(4):**

**Solution 2(1):**

**Solution 2(2):**

**Solution 2(3):**

**Solution 2(4):**

**Solution 2(5):**

**Solution 2(6):**

### Exercise-20

**Solution 1:**

- 9 (3 + 14)

= 9 × 3 + 9 × 14 - 25 (23 + 16)

= 25 × 23 + 25 ×16 - 20(58 + 109)

= 20 × 58 + 20 × 109

**Solution 2:**

- 15 × 3 + 15 × 7

= 15 (3 + 7) - 9 × 38 + 9 × 12

= 9 (38 + 12) - 125 × 69 + 125 × 31

= 125 (69 + 31)

**Solution 3:**

- 9 × 38 + 9 × 12

= 9 (38 + 12)

= 9 × 50

= 450 - 125 × 69 + 125 × 31

= 125 (69 + 31)

= 125 × 100

= 12,500 - 594 × 210 + 594 × 290

= 594 (210 + 290 )

= 594 × 500

= 2,97,000 - 16 × 81 + 34 × 81

= 81 (16 +34)

= 81 × 50

= 4,050

**Solution 4:**

- 51 × 51

= 51 (50 + 1)

= 51 × 50 + 51 × 1

= 2550 + 51

= 2,601 - 75 × 75

= 75 (70 + 5)

= 75 × 70 + 75 × 5

= 5250 + 375

= 5,625 - 102 × 102

= 102 (100 + 2)

= 102 × 100 + 102 × 2

= 10200 + 204

= 10,404