x+10-20=70-10

  x-20+40=40+20

a, 100 . 10 + 200 . 10=?

b, 10 . 20 + 20 . 40=?

Help you solve math 's answer is correct

A=\(\dfrac{1}{3.6}\)+\(\dfrac{1}{6.9}\)+...+\(\dfrac{1}{123.126}\)=?

50+100+10+50+900=?

30+80+40+70+60+20=?

20+50+40+30+10=?

Help you solve math that right

A=\(\dfrac{1}{5.9}\)+\(\dfrac{1}{9.13}\)+...+\(\dfrac{1}{161.165}\)=?

We have:

2=2

3=3

4=2²

Samllest positive integer divisible by 2,3 and 4:

2².3=4.3=12

Answer:12

Số nguyên dương chia hết cho cả 7 là

Help you solve math is that right

Dao Trong Luan is true but needs to be done by Help you solve math

ok nha

A=\(\dfrac{1}{3.6}\)+\(\dfrac{1}{6.9}\)+...+\(\dfrac{1}{132.135}\)

A=?

Help you solve math is that right

(900-38). 38+(800+62). 62=?

Gọi số cần tìm là A. A có 3 chữ số. Nếu viết thêm chữ số 2 vào bên trái số A thì được số mới là : 2A
Theo đề bài thì:

Help you solve math is answer question very good

A=\(\dfrac{1}{6.10}\)+\(\dfrac{1}{10.14}\)+\(\dfrac{1}{14.18}\)+...+\(\dfrac{1}{202.206}\)

A=?

C, 239 nha