5*(-4)-3+(-5)
Tính nhanh
tính nhanh 3/4 * 4/5 + 3/4 * 8/5 - 3/4 * 7/5
`3/4 xx4/5 +3/4xx8/5-3/4xx7/5`
`=3/4xx(4/5+8/5-7/5)`
`=3/4xx5/5`
`=3/4xx1`
`=3/4`
ღYêᑌ_ ᒪღ
`3/4 xx 4/5 + 3/4 xx 8/5 - 3/4 xx 7/5`
`=3/4 xx (4/5 + 8/5 -7/5)`
`= 3/4 xx 5/5`
`= 3/4 xx 1`
`= 3/4`
Bài 1.tính nhanh
3^5.( 5^4 - 4^3 )- 5^4. ( 3^ 5 -4 ^ 3) = ?
tính nhanh 3/4:5/4:3/5:3/8
Tính nhanh:
(-4/5+4/3) + (-5/4+14/5)-7/3
(-4/5+4/3)+(-5/4+14/5)-7/3=-4/5+4/3-5/4+14/5-7/3=(-4/5+14/5)+(4/3-7/3)-5/4=2+(-1)-5/4=1-5/4=-1/4
Tính nhanh :
1\(\dfrac{4}{5}\) + 2\(\dfrac{5}{7}\) + 3\(\dfrac{4}{5}\) + 4\(\dfrac{5}{7}\)
Giúp mik nhanh với mik đang cần gấp
\(1\dfrac{4}{5}+2\dfrac{5}{7}+3\dfrac{4}{5}+4\dfrac{5}{7}\)
\(\text{=}\left(1\dfrac{4}{5}+3\dfrac{4}{5}\right)+\left(2\dfrac{5}{7}+4\dfrac{5}{7}\right)\)
\(\text{=}1+3+\left(\dfrac{4}{5}+\dfrac{4}{5}\right)+2+4+\left(\dfrac{5}{7}+\dfrac{5}{7}\right)\)
\(\text{=}10+\dfrac{8}{5}+\dfrac{10}{7}\text{=}131\dfrac{1}{35}\)
tính nhanh
(-1/3)-3/4-(-1/5)-1/4+4/5+1/3
\(\left(-\dfrac{1}{3}\right)-\dfrac{3}{4}-\left(-\dfrac{1}{5}\right)-\dfrac{1}{4}+\dfrac{4}{5}+\dfrac{1}{3}\)
\(=\left[\left(-\dfrac{1}{3}\right)+\dfrac{1}{3}\right]-\left(\dfrac{3}{4}+\dfrac{1}{4}\right)+\left(\dfrac{1}{5}+\dfrac{4}{5}\right)\)
\(=0-\dfrac{4}{4}+\dfrac{5}{5}\)
\(=0-1+1\)
\(=0\)
=-1/3+1/3-3/4-1/4+1/5+4/5
=-1+1
=0
Tính nhanh
A = 4/3 - ( 5/3 - 3/4 + 5/18 ) + ( 9/4 - 8/3 )
\(A=\dfrac{4}{3}-\left(\dfrac{5}{3}-\dfrac{3}{4}+\dfrac{5}{18}\right)+\left(\dfrac{9}{4}-\dfrac{8}{3}\right)\\ A=\dfrac{4}{3}-\dfrac{5}{3}+\dfrac{3}{4}-\dfrac{5}{18}+\dfrac{9}{4}-\dfrac{8}{3}\\ A=\left(\dfrac{4}{3}-\dfrac{5}{3}-\dfrac{8}{3}\right)+\left(\dfrac{3}{4}+\dfrac{9}{4}\right)-\dfrac{5}{18}\\ A=-3+3-\dfrac{5}{18}\\ A=-\dfrac{5}{18.}\)
Tính nhanh
5 + 4 × 3 + 4 × 5 +3
Ai nhanh mình tick
5 + 4 x 3 + 4 x 5 + 3
= 5 + 12 + 20 + 3
= 17 + 20 + 3
= 37 + 3
= 40
5 + 4 × 3 + 4 × 5 +3 =
= 5+12+20+3
= 17+23
= 40
tính nhanh
1/10 * 2/3 * 3/4 *4/5 * 5/6 * 6/5 * 5/4 * 4/3 * 3/2
kết quả của câu này là 1/10
k nha bn
Tính nhanh
3/4×5/7+3/2×2/7+5/4×3/
\(=\dfrac{3}{4}\times\left(\dfrac{5}{7}+\dfrac{4}{7}+5\right)\)
\(=\dfrac{3}{4}\times\dfrac{44}{7}=\dfrac{33}{7}\)