\(\dfrac{3}{4}+\dfrac{1}{25}+\dfrac{3}{100}=\dfrac{75}{100}+\dfrac{4}{100}+\dfrac{3}{100}=\dfrac{82}{100}=\dfrac{41}{50}\)
\(\dfrac{1}{20}+\dfrac{3}{4}+\dfrac{6}{5}=\dfrac{1}{20}+\dfrac{15}{20}+\dfrac{24}{20}=\dfrac{40}{20}=2\)
Tính nhanh
4 * 113 * 25 - 5 * 112 * 20
2 + 4 + 6 + 8 + ....... + 98 + 100 - ( 1 + 3 + 5 + ..........+ 97 + 99 )
Tính nhanh
a. 5/11 + 1/4 + 2/5 + 6/11 + 3/4 + 6/25 + 9/25
b. 19/4 + 37/100 + 1/8 + 1/2 + 163/100 + 3/8
2. Tính: A) 2/3 + 5/6 + 1/18. B) 3/4 + 2/25 + 7/100. C) 1/12 + 1/6 + 3/4.
Tính
A) 9+ 24/25
B) 1/20+ 1/4+ 2/5
C) 7/12+ 4
D) 10+ 9/8
E) 1/4+ 2/25+ 9/100
F) 28/90+ 6
G) 3/7+4/9+4/7+7/11
H) 1/8+1/12+3/8+5/12
Bài 8 :Tính tổng
A) 1/3 + 1/6 + 1/18 B) 1/20 + 1/4 + 2/5 C) 1/12 + 1/6 + 3/4 D) 1/4 + 2/25 + 3/100
~ GIÚP MÌNH VƠI MN ƠI ~
bài 1
4/7+4
3+6/11
3-5/7
21/9-2
15/24+2
63/45-20/25
3/4-2/8
6/7-5/8
37/45-5/9
46/39-11/13
5/12+3/4+1/3
1/2+3/7+11/14
7/10-(1/5+1/4)
15/4-2/3-3/4
tính nhanh:
a) 1/2*2/3 ; 5/6*6/7 ; 10/15*15/20 ;24/25*25/36
b)1/2*2/3*3/4*4/5*5/6*6/7*7/8*8/9*9/10
câu 6 : tính a) 3/5 + 1/3 b) 17/20 - 4/5 c) 25/35 x 4/5 d) 7/15 : 6/7
Bài 299: Tính
1) 1/3 x 1/2 x 3/7
2) 5/4 x 1/3 + 1/7
3) 8 x ( 8/9-2/3 )
4) 5/6 x 48/20 x 1/2
5) ( 2/5 + 3/4 ) x 8
6) 10 x ( 1/2-1/5 )
Trình bày rõ cách làm giúp nhen!!
