e) 103,7 × 101 - 103 - 0,7
= 103,7 × 101 - (103 + 0,7)
= 103,7 × 101 - 103,7
= 103,7 × (101 - 1)
= 103,7 × 100 = 10370
g) 124 × 76 + 12 × 248
= 124 × 76 + 12 × 2 × 124
= 124 × 76 + 24 × 124
= (76 + 24) × 124
= 100 × 124 = 12400
i) 128 × 68 + 16 × 256
= 128 × 68 + 16 × 2 × 128
= 128 × 68 + 32 × 128
= 168 × (68 + 32)
= 128 × 100 = 12800