tim cac tich bang nhau ma khong can tinh ket qua cua moi tich :
15 . 2 . 6 ; 4 . 4 . 9; 5 . 3 . 12 ; 8 . 18 ; 15 . 3 . 4 ; 8 . 2 . 9
tim cac tich bang nhau ma khong can tinh ket qua cua moi tich
15.2.6 4.4.9 5.3.12 8.18 15.3.4 8.2.9
15.2.6 4.4.9 5.3.12 8.18 15.3.4 8.2.9
cho 9 so tu nhien giam dan 9 8 7 6 5 4 3 2 1.co the dat cac dau "+","-" de ket qua cua phep tinh bang 6?
bai 1;tinh gia tri bieu thuc 17a+15b+6a+8b voi a+b =100
bai 2;tich cua 2 so la 6210.neu giam 1 thua so di 7 don vi thi tich moi la 5265.tim cac thua so cua tich
bai 3;co 5 so tu nhien nao ma tich cua chung bang1001 va chu so tan cung la 6
bai 4;tinh;333...3.999...9 trong do co 50 chu so 3 va 50 chu so 9
CO MOT CAI LEU HINH VUONG DUOC DUNG O TRUNG TAM CUA MOT MANH VUON HINH VUONG .KHOANG CACH TU MOI MEP NGOAI CAI LEU TOI TUONG BAO QUANH KHU VUON LA 8M .BIET TONG DIEN TICH CUA PHAN MANH VUON KHONG TINH CAI LEU LA 448 M2.TINH DIEN TICH CAI LEU THEO M2
(BAI NAY DO CAC EM LOP 6 CHUA HOC CACH GOI X DE LAP PHUONG TRINH ,NEN CAC EM PHAI GIAI BANG CACH DAT LOI GIAI VA LAM CAC PHEP TINH)
Khong thuc hien phep tinh de tim ket qua. Hay chung minh rang cac tong sau lon hon 1
N = \(\frac{21}{90}+\frac{31}{72}+\frac{21}{40}+\frac{-1}{45}+\frac{-1}{50}\)
113.(tr99,ko hieu dc trong sach nha)
5 | ||
4 | 0 |
Hay dien cac so 1,-1,2,-2,3,-3,vao cac o trong o hinh vuong ben(moi so vao 1 o ) sao cho tong 3 so tren moi dong,moi cot hoac moi duong cheo deu bang nhau
114.Liet ke va tinh tong tat ca cac so nguyen x thoa man:
a) -8 < x < 8 b) -6 < x < 4 c) -20 < x < 21
118.Tim so nguyen x biet :
a) 2x - 35 = 15 ; b) 3x + 17 = 2; c) | x - 1 | = 0
119. Tinh bang 2 cach:
a) 15 x 12 - 3 x 5 x 10 b) 45 - 9 x ( 13 + 5 ) c) 29 x ( 19 - 13 ) - 19 x ( 29 - 13 )
120. Cho 2 tap hop : A = { 3;-5;7} ; B = { -2;4;-6;8}
a) Co bao nhieu tich ab ( voi a thuoc A va b thuoc B ) duoc tao thanh?
b) Co bao nhieu tich lon hon 0,bao nhieu tich nho hon 0?
c) Co bao nhieu tich la boi cua 6?
d) Co bao nhieu tich la uoc cua 20?
Giup mk nha may bn dang can gap
khi dat tinh thuc hien phep nhan mot so tu nhien voi 208 hoc sinh da so y dat cac tich rieng thang cot voi nhau cong cac tich rieng nhu cong cac so tu nhien nen tim duoc tich sai bang 2860 em hay tim tich dung