dung nam chu so 5 ,dau cac phep tinh va dau ngoac (neu can ),hay viet mot bieu thuc co gia tri bang 6
Voi sau chu so 3 va dau ngoac, dau phep tinh va so mu. Hay viet thanh bieu thuc co gia tri 106 bang 3 cach.
với nam chu so 2 hay lap cac so va dung dau phep tinh de lap mot bieu thuc co gia tri bang 888
ta lap duoc bieu thuc co gia tri bang 888 la
222*2*2
ta lap duoc bieu thuc co gia tri bang 888 la .2 * 2 *222
giải giúp nha
dung 5 chu so 1,2,3,4,5 va dau cac phep , dau ngoac de viet bieu thuc co gia tri bang 1
giúp nhoa . cảm ơn nhiều
ai trả lời nhanh nhất mình sẽ k cho nè
dung 1 so chu so 1 va dau cac phep tinh ke ca ngoac de viet thanh bieu thuc co gia ti 100. sao cho dung it chu sao 1 nhat
5,5,5,5,5:them vao day cac dau,dau ngoac,de viet ra 1 bieu thuc co gia tri la100
cho 8 so 8 va cac dau hay lam ra mot bieu thuc co gia tri la 1000
\(888+88+8+8+8=1000\)
\(\left(8888-888\right)\div8=1000\)
cho bieu thuc:
A=(6-2/3+1/2)-(5+5/3-3/2)-(3-7/3+5/2)
hay tinh gia tri cua A theo hai cach
cach 1:truoc het tinh gia tri tung bieu thuc trong ngoac
cach 2:bo dau ngoac roi nhom cac so hang thich hop
C1: \(A=\left(\frac{36}{6}-\frac{4}{6}+\frac{3}{6}\right)-\left(\frac{150}{30}+\frac{50}{30}-\frac{45}{30}\right)-\left(\frac{18}{6}-\frac{14}{6}+\frac{15}{6}\right)\)
\(=\frac{35}{6}-\frac{155}{30}-\frac{19}{6}=\frac{35}{6}-\frac{31}{6}-\frac{19}{6}=-\frac{15}{6}=-2\frac{1}{2}\)
C2: \(6-\frac{2}{3}+\frac{1}{2}-5-\frac{5}{3}+\frac{3}{2}-3+\frac{7}{3}-\frac{5}{2}\)
\(=\left(6-5-3\right)-\left(\frac{2}{3}+\frac{5}{3}-\frac{7}{3}\right)+\left(\frac{1}{2}+\frac{3}{2}-\frac{5}{2}\right)\)
\(=-2-0-\frac{1}{2}=-2\frac{1}{2}\)
dung cac phep tich+,-,*,:va dau ngoac giua cac so de tao thanh phep tinh dung
10 9 8 7 6 5 4 3 2 1 = 2017
chu y rang cac dau phep tinh va dau ngoac duoc su dung khong gioi han so lan
cho 6 chu so 9 dung dau va cac phep tinh de tao phep tinh dung de co ket qua bang 100