Các câu hỏi tương tự
tính tổng
B= 7-7 mu 4 + 7 mu 4 -........+7 mu 301
A = 1 + 5 mũ 2 + 5 mu 4 + 5 mu 6 +.....+5 mu 200
tính
A= 1/7+1/7mu 2 + 1/7 mu 3+......+1/7mu 100
B=-4/5+4/5 mu 2 - 4/5 mu 3 + ....+4/5mu 200
tính A=25 mũ 8 + 25 mũ 4 + 25 mu 20 +......+25 mu 4 +1 / 25 mu 20 + 25 mu 28 + 25 mu 26 +.....= 25 mu 2 +1
( x - 1 ) mu 2 : 5 mu 21 = 25 mu 30 . 5
2.3 mu x + 1 = 10.3 mu 12 + 8 : 27 mu 4
( 19x + 2 .5 mu 2) : 14 = ( 13 - 8 ) mu 2
1351 - 2 . ( x + 3) = 4 mu 12 : 8 mu 7 + 3
mong m.n giup mk vs !!!!
B=1/3+1/3 mu 3 +1/3 mu 5 +1/3 mu 7 + ...+1/3 mu 99
M= 3/1 mu 2 . 2 mu 2 +5/2 mu 2 . 3 mu 2+7/3 mu 2 . 4 mu 2 + ...+19= 9 mu 2 . 10 mu 2
bai 1; cho tong M =126 +213+x. Tim x de M chia het cho 3
bai 2; chung to rang tong ; A= 2 + 2 mu 3 + 2 mu 4 + 2 mu 5 + 2 mu 6 +2 mu 7 +2 mu 9 + 2 mu 10 + 2 mu 12 chia het cho 5
Rut gon cac phan so
a) -21 / 49 ; 39 / -65
b ) 5 mu 4 . 7 mu 3 / 5 mu 5 . 7 mu 2 ; 2 mu 2 . 3 mu 5 . 5 / 2 mu 4 . 3 mu 4 . 5 mu 2
3 mu 3 nhan 9 tru 3 mu 4 nhan 3 cong 5 mu 8 nhan 5 mu 0 tru 5 mu 12 chia 25 mu 2
Tìm X biết :
x - 5 = 7 mu 10 :7 mu 8 + 2 mu 2018 nhan ( 2 mu 4 - 4 mu 2)
a] 4 mu 2016: 4 mu 2015 + 10.10 mu 2 =
b] 3 mu 4 . 47 . 63 - 3 mu 4 . 10 =
c] 2016 : { 2464 : [171 - 5 ( 9 mu 2 - 7 mu 2)]} =
d] 1 + 3+ 5 +....... + 2011 + 2013=
Bai3:Tinh bang hai cach
Cach 1:Tinh gia tri so bi chia,so chia roi tinh gia tri ket qua.
Cach2:Chia hai luy thua cung co so.
a,3 mu 6 :3 mu 4
b,5 mu 7: 5 mu 5
c,3 mu 9: 3 mu 3
d,5 mu 5: 5
e,3 mu 2: 3 mu 0