50

chiil

Số số hạng của dãy số là:

10-0+1=11(số)

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

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1: Đáp số :4A=28, 4B=56

Học tốt oke chưa

4A = 28 ,4B = 56

1 chếc bút chì có giá là 

4500 : 3 = 1500

6 chiếc bút chì cùng loại mua hết số tiền là

1500 \(\times\) 6 = 9000

T hộ mik

6 bút chì cùng loại như thế hết số tiền là :

4500 x 2 = 9000 ( đồng ) 

Đáp số : 9000 đồng 

77 phút

77phút

Giải

Số nhãn của Lan là: 90 - 9 = 81 cái

1/9 số nhãn vở của Lan là: 81 : 9 = 9 cái

Số nhãn vở của Liên là: (9 + 13) x 6 = 132 cái

1/3 số nhãn vở của Liên là: 132 : 3 = 44 cái

Số nhãn vở của Huệ là: (44 - 15) x 4 = 116 cái

Cả 3 bạn có số nhãn vở là: 81 + 132 + 116 = 329 cái

ĐS: 329 cái

ko tick cho người nào mà không đúng chủ đề câu hỏi này nha

100 viên bi

100 viên

56

56 dm

10.000.000 Đơn vị

Gọi số tự nhiên có 5 chữ số là \(\overline{abcde}\). Theo đề bài, khi viết thêm số 100 vào bên trái số đó ta được số \(\overline{100abcde}\)

Khi đó số tự nhiên ban đầu sẽ tăng lên:

\(\overline{100abcde}-\overline{abcde}=10000000\) (đơn vị)

Đáp số: 10000000 đơn vị

có google để làm gì bạn

                    Bài giải :

Số tiền mua mỗi cái cặp ghim hết là :

       4500 : 3 = 1500 ( đồng )

Số tiền mua tám cái cặp ghim hết là :

        1500 x 8 = 12000 ( đồng )

            Đáp số : 1200đồng