Berpakah hasilnya? Tolong jawab ya..

1. 9×123 = 9×(100+20+3)
=(9×100)+(9×20)+(9×3)
=900+180+28
=1108

2. 87×4 =(80+7) ×4
=(80×4) + (7×4)
=360+28
=378

3. 6×56=6×(60-4)
=(6×60)-(6×4)
=360-24
=374

4. 5×78=5× (80-2)
=(5×80)-(5×2)
=400-10
=300

5. (4×9)+(4×1)
=4×(9+1)
=4×10
=40

6. (32×2)+(18×2)
=(32+18)×2
=50×2
=100

7. (12×3)+(43×3)+(45×3)
=(12+43+45)×3
=100×3
=300

8. (5×87)-(5×6)+(5×9)
=5×(87-6+9)
=5×90
=450

maaf kalo ada kesalahan. ^^