Tính: b ) 3 7 + 8 5
tính bằng 2 cách
a, (5/8-7/2):6/5
b, 4/7.(8/5+5/3)
c,7/2 :(8/5 -2/3)
Bài 1 :Tính nhanh
A=2/7+-3/8+11/7+1/3+1/7+5/-8
B=-3/8+12/25+5/-8+2/-5+13/25
Bài 1 :Tính nhanh
A=2/7+-3/8+11/7+1/3+1/7+5/-8
B=-3/8+12/25+5/-8+2/-5+13/25
A=2/7+-3/8+11/7+1/3+1/7+5/-8
A=(2/7 + 1/7 + 11/7) + (-3/8 + 5/-8) + 1/3
A=2 + (-1) + 1/3
A=1 + 1/3
A=4/3
B=-3/8+12/25+5/-8+2/-5+13/25
B=(-3/8 + 5/-8) + (12/25 + 13/25) + 2/-5
B=-1 + 1 + 2/-5
B=-2/5
Bài 1: Tính :
a) 2/5 + 7/10 = ……………………………………………….......................... b) 6/7 - 5/8 = …………………………………………………………………… c) 3/5 x 15/8 =…………………………………………………………............ d) 1/4 : 3/7 =……………………………………………………………..............a]11/10
b]13/56
c]9/8
d]7/12
tick cho mình nha
a,2/5+7/10=11/10 b,6/7-5/8=13/56 c,3/5 x 15/8=9/8 d,1/4:3/7=7/12 HT
tính :
a . 4 3/4 + 3 5/8 =
b. 8 7/12 - 5 3/8 =
c. 2 9/13 x 3 5/7 =
( lưu ý đây là hỗn số )
b: \(=8+\dfrac{7}{12}-5-\dfrac{3}{8}=3+\dfrac{5}{24}=\dfrac{77}{24}\)
Tính nhanh :
B=(7/1/3+8/1/5)-(7/1/5+8/1/7-3/1/4)
B = ( 7\(\frac{1}{3}\) + 8\(\frac{1}{5}\) ) - ( 7\(\frac{1}{5}\) + 8\(\frac{1}{7}\) - 3\(\frac{1}{4}\) )
B = ( \(\frac{22}{3}\) + \(\frac{41}{5}\)) - ( \(\frac{36}{5}\) + \(\frac{57}{7}\) - \(\frac{13}{4}\) )
B = \(\frac{233}{15}\) - \(\frac{1693}{140}\)
B = \(\frac{289}{84}\)
Tính nhẩm:
a. 1+1+2+2+3+3+4+4+5+5+6+6+7+7+8+8+9+9= ....?
b. 9-9+8-8+7-6+6-5+1-3+2+4+5+6-3-8=....?
Cho phép tính sau: (25+7) : (56−25)× ( 8 : 3) :2+64 ×3%
Phép tính nào thực hiện được trong chương trình bảng tính?
A.
=(25+7)/(56-25)x(8/3)/2+6^4x3%
B.
=(25+7)/(56-2^5)x(8/3):2+6^4x3%
C.
=(25+7)/(56-25)*(8/3)/2+64* 3%
D.
=(25+7)/(56-2/5)x(8/3)/2+6^4x3%
1 tính
a,( 5/6 + 3/8 ) x 2/7
b,6/7x2/3:5/7
c,8/9+3/4x4/9
a)\(\left(\dfrac{5}{6}+\dfrac{3}{8}\right)\times\dfrac{2}{7}\)
\(=\dfrac{29}{24}\times\dfrac{2}{7}\)
\(=\) \(\dfrac{29}{84}\)
b) \(\dfrac{6}{7}\times\dfrac{2}{3}\div\dfrac{5}{7}\)
= \(\dfrac{4}{7}\div\) \(\dfrac{5}{7}\)
= \(\dfrac{4}{5}\)
c) \(\dfrac{8}{9}+\dfrac{3}{4}\times\dfrac{4}{9}\)
= \(\dfrac{8}{9}+\dfrac{1}{3}\)
= \(\dfrac{5}{9}\)
Cô tích xanh cho lisa blackpink vì câu a, b đúng. Còn câu c thì em làm như sau:
c, \(\dfrac{8}{9}\) + \(\dfrac{3}{4}\) \(\times\) \(\dfrac{4}{9}\)
= \(\dfrac{8}{9}\) + \(\dfrac{1}{3}\)
= \(\dfrac{8}{9}\) + \(\dfrac{3}{9}\)
= \(\dfrac{11}{9}\)
Bài 1: Tính :
a) 2/5 + 7/10 = ............................................................................................ b) 6/7 - 5/8 = …………………………………………………………………… c) 3/5 x 15/8 =............................................................................................. d) 1/4 : 3/7 = …………………………………………………………….............
a) = 11/10
b) = 13/56
c) = 9/8
d) = 7/12