Số số hạng của dãy số là:

10-0+1=11(số)

Tổng của dãy số là: \(\left(10+0\right)\times\frac{11}{2}=10\times\frac{11}{2}=5\times11=55\)

8888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888+999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999=bao nhiêu?

100 viên bi

100 viên

50

chiil

Số người mỗi hàng có là:

756:7=108 ( người )

Đáp số 108 người

1.

(x-119) - 20 = 306

x-119 = 306 + 20

x- 119 = 326

đến đây tự làm

750 - ( x + 8 ) = 606

x + 8 = 750 - 606

x + 8 = 144

tự làm tiếp nhé

???

( x - 16 ) : 9 = 12

x - 16 = 12 x 9

x - 16 = 108 

Tự làm tiếp nha

5 x ( x - 7 ) = 25

x - 7 = 25 : 5

x - 7 = 5

bạn chịu khó làm tiếp

2. Giải

Ngta đã cắt số m vải là :

48 x \(\frac{1}{6}\)= 8 ( m )

Còn lại số m vải là :

 48 - 8 = 40 ( m )

ĐS: 40 mét vải

3. Giải

Mẹ cho Hồng số viên kẹo là :

32 x \(\frac{1}{4}\)= 8  ( viên )

Mẹ còn số viên kẹo sau khi cho Hồng là :

32 - 8 = 24 ( viên )

Mẹ cho Huệ số viên kẹo là :

24 x \(\frac{1}{6}\)=  4 ( viên )

Mẹ còn lại số viên kẹo là :

32 - 8 - 4 = 16 ( viên )

ĐS : 16 viên kẹo

5 chiếc bút chì dài số cm là

9 x 5 = 45 (cm)

vậy : .....

Năm chiếc bút chì dài giống nhau có tổng độ dài là:

9×5=45(cm)

Đáp số :45cm

99 : 9 = 11

\(99\div9=11\)

dễ nhưng lười làm

= ko làm

lời khuyên

pạn nên cho 1 bài thôi

chứ nếu ko , câu hỏi của pạn sẽ ko có câu trả lời đâu

dùng máy tính là đc...còn k thì lười làm..chỉ biết chép thôi

miu có 22 cái bánh bạn nhé

20-(7-5)=20-2=18

đúng khum bạn

Cgcr