`A=3/4 xx 5/9 +(5/2 -1/2):2`

`A=5/12 +1`

`A=17/12`

`30` phút nữa kim đồng hồ tạo thành góc bẹt.

`7^13 : 7^11 - 9^12 : 9^4=7^4 -9^8=-43044320`

Bill said that he has done this exercise two days before.

`2a`

`3c`

`4c`

`5` đáp án thiếu

`6a`

`7b`

`8a`

`A`

`=> 240:(x-5)=80`

`=> x-5=3`

`=> x=8`

đáp án phải là ung thư chứ?

My aunt told him that whether he was short of money, she could lend him 50 pounds.

`b) 16xx125=2xx8xx125=2xx1000=2000`

`c) 9xx24xx25=9xx6xx4xx25=54xx100=5400`