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0,025 x 628 + 36,2 x 25% + \(\frac{1}{4}\)
= 0,025 x 10 x 62,8 + 36,2 x \(\frac{1}{4}\)+ \(\frac{1}{4}\)
= \(\frac{1}{4}\) x 62,8 + 36,2 x \(\frac{1}{4}\)+ \(\frac{1}{4}\)
= \(\frac{1}{4}\)x ( 62,8 + 36,2 + 1 )
= \(\frac{1}{4}\)x 100
= 25
B) 1,25X 0,25 X4 X8
=( 1,25 X 8 ) X (0,25 X 8 )
= 10 X 1
= 10
C)12,5 x 0,8 x 10
=(12,5 x 0,8)x10
= 100 x 10
=1000
D) 0,025 x 10 x 4
= (0,025x 10)x4
= 0,25 x 4
= 1
CHÚC BN HỌC TỐT !
3,95 x 1/4 + 3,95 x 9,85 - 3,95 : 10
= 3,95 x 0,25 + 3,95 x 9,85 - 3,95 x 0,1
= 3,95 x ( 0,25 + 9,85 - 0,1 )
= 3,95 x 10
= 39,5
1/2* x+2/3=9/2
1/2 * x = 9/2 - 2/3
1/2 * x= 23/6
x= 23/6 : 1/2
x= 23/6 x 2= 23/3
___
1/2*x-1/3=2/3
1/2*x = 2/3 + 1/3
1/2 * x= 1
x= 1: 1/2
x= 2
____
1/4+3/4:x=3
3/4 : x = 3 - 1/4
3/4 : x= 11/4
x= 11/4 : 3/4
x= 11/3
\(\dfrac{1}{2}\)\(\times\)\(x\) + \(\dfrac{2}{3}\) = \(\dfrac{9}{2}\)
\(\dfrac{1}{2}\)\(\times\)\(x\) = \(\dfrac{9}{2}\) - \(\dfrac{2}{3}\)
\(\dfrac{1}{2}\)\(\times\)\(x\) = \(\dfrac{23}{6}\)
\(x\) = \(\dfrac{23}{6}\):\(\dfrac{1}{2}\)
\(x\) = \(\dfrac{23}{3}\)
\(\dfrac{1}{2}\)\(\times\)\(x\) - \(\dfrac{1}{3}\) = \(\dfrac{2}{3}\)
\(\dfrac{1}{2}\)\(\times\)\(x\) = \(\dfrac{2}{3}\) + \(\dfrac{1}{3}\)
\(\dfrac{1}{2}\times\)\(x\) = 1
\(x\) = 1 : \(\dfrac{1}{2}\)
\(x\) = 2
\(\dfrac{1}{4}\) + \(\dfrac{3}{4}\): \(x\) = 3
\(\dfrac{3}{4}\): \(x\) = 3 - \(\dfrac{1}{4}\)
\(\dfrac{3}{4}\):\(x\) = \(\dfrac{11}{4}\)
\(x\) = \(\dfrac{3}{4}\): \(\dfrac{11}{4}\)
\(x\) = \(\dfrac{3}{11}\)
1,23 x 99 + 1,23 x 25% + 1,23 x 3/4
= 1,23 x 99 + 1,23 x 1/4 + 1,23 x 3/4
= 1,23 x (99 + 1/4 + 3/4)
= 1,23 x 100
= 123
1,23 x 99 + 1,23 x 25% + 1,23 x 3/4
= 1,23 x 99 + 1,23 x 0,25 + 1,23 x 0,75
= 1,23 x (99 + 0,25 + 0,75)
= 1,23 x 100
= 123
Chúc bạn học tốt.
😁😁😁
\(3\cdot x+2\cdot x+x=36.2\)
\(\left(3+2+1\right)\cdot x=36.2\)
\(6\cdot x=36.2\)
\(x=36.2:6\)
\(x=\frac{181}{30}\)
a=247,75
là đ/s
A = 0,025 x 628 + 36,2 x 25% + \(\frac{1}{4}\)
A = 0,25 x 628 : 100 + 36,2 x 0,25 + 0,25
A = 0,25 x 62,8 + 36.2 x 0,25 + 0,25 x 1
A = 0,25 x ( 62,8 + 36,2 + 1 )
A = 0,25 x 100
A = 25