Viết mỗi biểu thức sau thành 2 tích:

a)27+31+41+54+67+80+90+94

b)mn+pp+xx+yy+nn

bài 3:

a)27+31+41+54+67+80+90+94

b)mn+pp+xx+yy+nn

viet bieu thuc sau thanh tich co 3 thua so

12+21+20+11+15+51

khi thuc hien phep nhan 2 thua so, mot ban da viet nham 2 chu so cuoi cung cua thua so thu 1 la 35 thanh 53 nen co ket qua la 22197.tim 2 thua so da cho, biet rang tich dung cua chung la 21315

Viet bieu thuc dai so bieu thi:

a) tich cua 3 so nguyen lien tiep;

b) tong cac binh phuong cua 2 so le bat ki

c) thuong cua 2 so nguyen trong do mot so chia cho 3 du 1 ,mot so chia cho 3 du 2;

d) luy thua bac n cua tong hai so a va b

1/Hay viet bieu thuc dai do bieu thi chu vi cua hinh chu nhat co chieu dai hon 2 lan chieu rong 3m

2/ Hay viet bieu thuc dai so bieu thi chu vi cua hinh chu nhat co 3 lan chieu ronh hon chieu dai 8m

3/ hay viet bieu thuc dai so bieu thi the tich cua hinh hop chu nhat co chieu dai hon chieu ronh 4cm va hon chieu cao 2cm

4/ hay viet bieu thuc dai so bieu thi :

      a) tong cua x^2 va 3y

      b) tong cac binh phuong cua a va b

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

hay viet moi so 6.12.20 thanh tich cua hai thua so lien nhau

moi phep nhan voi 127. Do so y nen An viet nham so 7 cua thua so thu 2 thanh 4 nen tich giam di 1245 don vi.T ich dung la ......