tinh gia tri bieu thuc bag cach thuan tien
36,67+13,92+43,65+65,33+86,08+56,35=...
464 : 4 + 81 x 2
tinh gia tri bieu thuc bang cach thuan tien nhat
\(464\div4+81\times2\)
\(=116+162\)
\(=278\)
tinh gia tri bieu thuc bang cach thuan tien nhat
53.68 * 15.6 - 53.68 *5.6
\(53.68x15.6-53.68x5.6\)
\(=53.68x\left(15.6-5.6\right)\)
\(=53.68x10\)
\(=536.8\)
Nhớ k mk nha bn minh tuyệt vọng lắm!
53,68*15,6-53,68*5,6
=53,68* (15,6-5,6)
=53,68-10
=5,368
Tinh gia tri bieu thuc : 170 + 9 + 6/100 + 3/10 ; tinh bang cach thuan tien : 1/2 : 0.5 - 1/4 : 0.25 + 1/8 : 0.125 - 1/10 : 0.1
Tinh gia tri bieu thuc bang cach thuan tien nhat :
1. A= 20,11 x 2,4 + 1,4 x 40,22 - 10,05 x 10,4
2. B= 3/ 1x12 + 3/ 3x20 + .... + 3/ 97x9702 + 3/ 98x9900
1) \(A=20,11\times2,4+1,4\times20,11\times2-10,05\times10,4\) (tách 40,22 = 20,11 x 2)
\(=20,11\times\left(2,4+1,4\times2\right)-10,05\times10,4\)
\(=20,11\times5,2-10,05\times5,2\times2\) (tách 10,4 = 5,2 x 2)
\(=5,2\times\left(20,11-20,1\right)\)
\(=5,2\times0,01\)
\(=0,052\)
90872:296
tinh gia tri cua bieu thuc
6- 3\7*14\9=
tinh bang cach thuan tien
3\4*4\7= 3\7* 3\4+3\4=
ai tra loi nhanh thi minh tik cho
\(90872:296=307\)
\(6-\frac{3}{7}\)X \(\frac{14}{9}=\frac{124}{23}\)
\(\frac{3}{4}\)X \(\frac{4}{7}=\frac{3}{7}\)X \(\frac{3}{4}+\frac{3}{4}=\frac{9}{28}+\frac{3}{4}=\frac{15}{14}\)
34,67+19,82+43,65+56,35+73,33+86,08. tính bằng cách thuận tiện
34,67+19,82+43,65+56,35+73,33+86,08
=(34,67+73,33)+(19,82+86,08)+(43,65+56,35)
=108+105,9+100
=313,9
k mik nhé Trần Thị Minh Châu
Tinh gia tri bieu thuc bang cach thuan tien nhat :
A= 1/10 x 2/9 x 3/8 x 4/7 x 5/6 x 6/5 x 7/4 x 8/3 x 9/2
tinh gia tri bieu thuc bang hai cach 347535:45
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: \(6-\frac{2}{3}+\frac{1}{2}-5-\frac{5}{3}+\frac{3}{2}-3+\frac{7}{3}-\frac{5}{2}\)
\(=\left(6-5-3\right)-\left(\frac{2}{3}+\frac{5}{3}-\frac{7}{3}\right)+\left(\frac{1}{2}+\frac{3}{2}-\frac{5}{2}\right)\)
\(=-2-0-\frac{1}{2}=-2\frac{1}{2}\)