48 × 905 = 48 × (900 + 5) = 48 × 900 + 48 × 5 = 43200 + 240 = 4344059 × 932 = 59 × (900 + 32) = 59 × 900 + 59 × 32 = 53100 + 1888 = 54988
23 × 65 + 77 × 65 = (23 + 77) × 65 = 100 × 65 = 650042 × 37 + 58 × 37 = (42 + 58) × 37 = 100 × 37 = 3700
48 × 905 = 48 × (900 + 5) = 48 × 900 + 48 × 5 = 43200 + 240 = 43440
59 × 932 = 59 × (900 + 32) = 59 × 900 + 59 × 32 = 53100 + 1888 = 54988
23 × 65 + 77 × 65 = (23 + 77) × 65 = 100 × 65 = 6500
42 × 37 + 58 × 37 = (42 + 58) × 37 = 100 × 37 = 3700