Hay quá

1. Name two advantages of eating sugar.

- It gives you energy

- You feel less hungry.

2. Is a balanced diet alone enough for a healthy lifestyle ? Why ? Why not ?

=> No, because we also need exercises to keep a healthy life.

Đặt a=8k+3;b=8m+5

=>a.b=(8k+3).(8m+5)=64mk+40k+24m+15

vì 64mk chia hết cho 8;40k chia hết cho 8;24m chia hết cho 8 và15 chia cho 8 dư 7 nên

64mk+40k+24m+15 chia cho 8 dư 7

hay a.b chia 8 dư 7