Tinh:
4/5-7/8
9/15+50/12
89/4.7/78
8/9:2/12
Tìm số dư trong các phép chia sau :
1) 6^592 chia cho 11
2) 1532^5 -1 chia cho 9
3) 3.5^75 + 4.7^100 chia cho 132
4) 5^70 +7^50 chia cho 12
5) (5^30 +50)^30 chia cho 24
>,<,=
3/5...1/2 5/6...7/8 8/9...7/6
9/4..7/3 8/12...2/3 77/99...7/9
50/75 ... 10/15
a: 3/5>1/2
b: 5/6<7/8
c: 8/9<7/6
d: 9/4<7/3
e: 8/12=2/3
f: 77/99=7/9
\(\dfrac{3}{5}>\dfrac{1}{2}\)
\(\dfrac{5}{6}< \dfrac{7}{8}\)
\(\dfrac{8}{9}< \dfrac{7}{6}\)
\(\dfrac{9}{4}< \dfrac{7}{3}\)
\(\dfrac{8}{12}=\dfrac{2}{3}\)
\(\dfrac{77}{99}=\dfrac{7}{9}\)
\(\dfrac{3}{5}>\dfrac{1}{2}\)
\(\dfrac{5}{6}< \dfrac{7}{8}\)
\(\dfrac{8}{9}< \dfrac{7}{6}\)
\(\dfrac{9}{4}< \dfrac{7}{3}\)
\(\dfrac{8}{12}=\dfrac{2}{3}\)
\(\dfrac{77}{99}=\dfrac{7}{9}\)
A -17/30 + 11/15 - 7/12
1/2+3/4-(3/4-4/5)
-7/25×11/13+ -7/25×2/13-18/25
(-3,2)+ -15/64+(0,8-2 4/15)÷3 2/3
-5/9+5/9÷(1 2/3- 2 1/12)
-5/7×2/11+ -5/7×9/11+ 1 5/7
(3/8+ -3/4+7/12)÷5/6+1/2
50%×1 1/3×10×7/35×0,75
Mn giúp mk với
\(\dfrac{1}{2}+\dfrac{3}{4}-\left(\dfrac{3}{4}-\dfrac{4}{5}\right)\)
=\(\dfrac{1}{2}+\dfrac{3}{4}-\dfrac{3}{4}+\dfrac{4}{5}\)
=\(\left(\dfrac{1}{2}+\dfrac{4}{5}\right)+\left(\dfrac{3}{4}-\dfrac{3}{4}\right)\)
=\(\left(\dfrac{5}{10}+\dfrac{8}{10}\right)+0\)
=\(\dfrac{13}{10}\)
\(-\dfrac{7}{25}.\dfrac{11}{13}+\left(-\dfrac{7}{25}\right).\dfrac{2}{13}-\dfrac{18}{25}\)
=\(-\dfrac{7}{25}.\cdot\left(\dfrac{11}{13}+\dfrac{2}{13}\right)-\dfrac{18}{25}\)
=\(-\dfrac{7}{25}.1-\dfrac{18}{25}\)
=\(-\dfrac{7}{25}-\dfrac{18}{25}\)
=\(-\dfrac{25}{25}\) = \(-1\)
(-3,2) +\(\dfrac{15}{64}+\left(0.8-2\dfrac{4}{15}\right):3\dfrac{2}{3}\)
=\(-\dfrac{16}{5}+\dfrac{15}{64}+(\dfrac{4}{5}-\dfrac{34}{15}):\dfrac{11}{3}\)
=\(-\dfrac{16}{5}+\dfrac{15}{64}+(-\dfrac{22}{5}):\dfrac{11}{3}\)
=\(-\dfrac{16}{5}+\dfrac{15}{64}+\dfrac{-2}{5}\)
=(\(-\dfrac{16}{5}+\dfrac{-2}{5}\)) +\(\dfrac{15}{64}\)
=\(-\dfrac{18}{5}+\dfrac{15}{64}\)
\(-\dfrac{1152}{320}+\dfrac{75}{320}\)
\(-\dfrac{1077}{320}\)
câu 1: tính ( tính nhanh nếu có thể )
a, -12 phần 15 + 4 phần 5
b, -7 phần 23 * 19 phần 13 : -7 phânf 23
c, 15% * 0,9 + 15% * 10,1 + 15 phần 100 * 89
d, 1 phần 3*4 + 3 phần 4*7 +5 phần 7*12 + 7 phần 12*19 + 9 phần 19*28 + 11 phần 28*39
\(\frac{12}{15}\)+ \(\frac{4}{5}\)= \(\frac{8}{5}\)
tinh
a) 3/5 x 7/8 : 10/9
b) 3 2/7 x 2 1/4 : 1 2/5
c) 6/9 + 24/15 + 12/9 + 6/15
d) 3 2/9 - ( 1 5/8 + 1 2/9 )
a) 3/5x7/8:10/9=21/40:10/9=189/400
b) 3 2/7x2 1/4:1 2/5=23/7x9/4:7/5=207/28:7/5=1035/196
c) 6/9+24/15+12/9+6/15=34/15+12/9+6/15=18/5+6/15=4
d) 3 2/9-( 1 5/8+1 2/9 )=29/9-(13/8+11/9)=29/9-205/72=3/8
tinh
a) 3/5 x 7/8 : 10/9
b) 3 2/7 x 2 1/4 : 1 2/5
c) 6/9 + 24/15 + 12/9 + 6/15
1, Tinh nhanh nếu có thể
a, -4/9×7/15+4/-9×8/15
b, 5/-4×16/25+(-5/4)×9/25
c, 4 11/23-9/14+2 12/23-5/4
bạn nào giải thích rõ ràng ba k sẽ thụôc về bạn
a) -4/9 * 7/15 + 4/-9 * 8/15
= -4/9 * 7/15 + -4/9 * 8/15 ( 4/-9 = -4/9 )
= -4/9 * ( 7/15 + 8/15 )
= -4/9 * 1 = -4/9
b) 5/-4 * 16/25 + (-5/4) * 9/25
= -5/4 * 16/25 + -5/4 * 9/25 ( 5/-4 = -5/4 )
= -5/4 * ( 16/25 + 9/25 )
= -5/4 * 1 = -5/4
c) 4 11/23 chắc chắn là hỗn số rồi
Câu c) để sau
50+50+50=?
569+89+90=?
12+12=?
78+78=?
4+7=?
6+8=?
9+0=?
56-43=?
50+50+50
=150
569+89+90
= Bao nhiêu í mik chưa tính
12 + 12
=24
78+78
= 156
4+7
=11
6+8
=14
9+0
=9
56-43
= 13
=150
=748
=24
=156
=11
=14
=9
=13
nho k cho minh nha
Tinh nhanh
a ) 18*76+24*18-150
b ) 147 +230+53+70
c) 7*85+27*7-7*12
d) 58*75+58*50-58*25
e) 2 va3/5-2/5*(5/8-7/12)
f ) 1/3-5/4*4/15