\(\text{Chu vi hình vuông là:}\)

\(1508.4=6032\left(cm\right)\)

\(\text{Đáp số :...........}\)
 

6+6+5+3+0=20

tíc mình nha

2x3x5x7+17 không chia hết cho 10 vì 2x5=10 mà số  nào nhân 10 cũng có tận cùng là 0 

Mà phép tính 2x3x5x7+17 có tận cùng là 7 Nên không chia hết cho 10

\(\overline{a15b}\)chia hết cho 15 => \(\overline{a15b}\)chia hết cho 5 và 3.

Để \(\overline{a15b}\)chia hết cho 5 thì b=0 hoặc =5

Nếu b = 0 ta có những số sau: 3150; 6150; 9150

Nếu b = 5 ta có những số sau: 1155; 4155; 7155.

All Verb Tense Review

1. Henry ...... to Sam two hours before (talk)

2.By next summer Jayden .............. (complete) the beginners's computer course

3. Fortunately Abigail ..............( just / put up) her umbrella when it ...... (start) to pour . Or she would have been soaked

4. Guess what I ......... (wear) to the party last night? A vampire costume

5. Where ........ ( go) this summer? I ......... (go) on a trek in the Himalayas

Mọi người giải giùm với

Mixed Tense

1. It was a long time since we..... last..... Ron (see)

2. Tom ..... at school this morning (be)

3. Sarah .... to the supermarket, the fridge is full now (go)

4. How long was it since you ....... your hair cut ( last / have)

5. How long is it now since it last .....? (rain)

6. They ........ to our party ( probably/ come)

7. He ....... with matches when he burnt himself. (play)