4,58* 6,7+ 4,58* 28,3+ 4,58* 65

= 4,58 x ( 6,7 + 28,3 + 65 ) 

= 4,58 x 100

= 458 

4,58 * 6,7 + 4,58 * 28,3 + 4,58 * 65

= 4,58 * (6,7+28,3+65)

=4,58 * 100

= 458

=4.58x(6.7+28.3+65)=4.58x100=458

2,96 + 4,58 + 3,04 = 4,58 + (2,96 + 3,04)

= 4,58 + 6 = 10,58

a) 2,95+4,58+3,04

= 2,95+(4,57+0,01)+(3+0,04)

= (2,95+0,04+0,01)+3+4,57

= 3+3+4,57

=6+4,57

=10,57

b) 7,8+5,6+4,2+0,4

=(7,8+4,2)+(5,6+0,4)

= 12+6

= 18

c) 8,69+2,23+4,77

= 8,69+(2,23+4,77)

= 8,69+7

=15,69

10,57

18

15,69

a) = 10,57

b) = 18

c) = 15,69

6,9+8,75+3,1

=(6,9+3,1)+8,75

= 10 + 8,75

=18,75

4,67+5,88+3,12

=4,67+(5,88+3,12)

=4,67+ 9

= 13,67

0,15+1,19+2,25+0,81

= (0,15+2,25)+(1,19+0,81)

= 2,4+ 2

= 4,4

2,96+4,58+3,04

=(2,96+3,04)+4,58

= 6+4,58

= 10,58

7,8+5,6+4,2+0,4

=(7,8+4,2)+(5,6+0,4)

= 12+ 6

=18

8,69+2,23+4,77

=8,69+(2,23+4,77)

= 8,69+ 7

=15,69

k mình nha

6,9+8,75+3,1= ( 6,9 + 3,1) + 8,75 = 10 + 8,75= 18, 75

4,67+5,88+3,12= 4,67 + (5,88 + 3,12) = 4,67 + 9 = 13,67

0,15+1,19+2,25+0,81= (0,15 + 2,25 ) + (1,19 + 0,81) = 2,4 + 2 = 4,4

2,96+4,58+3,04= ( 2,96 + 3,04 ) + 4,58 = 6 + 4,58 = 10,58

7,8+5,6+4,2+0,4= (7,8 + 4,2 ) + ( 5,6 + 0,4) = 12+6 = 18

8,69+2,23+4,77= 8,69 + (2,23 + 4,77) = 8,69 + 7 = 15,69

dap an

18,75

13,67

4,4

10,58

18

15,69

a+b-50+100000=900000000

6,7 kg + 6,7kg + 6,7kg x7
= 6,7kg x 9
= 60,3kg

6,7 kg + 6,7 kg + 6,7 kg x 7

= 6,7 kg + 3 x 7

= 6,7 kg x ( 3 + 7 )

= 6,7 kg x 10

= 67 kg

tick cho mình nhé!

\(25\%\times6,28+\dfrac{1}{4}\times6,28+0,25\times6,28\\ =6,28\times\left(25\%+\dfrac{1}{4}+0,25\right)\\ =6,28\times\left(\dfrac{1}{4}+\dfrac{1}{4}+\dfrac{1}{4}\right)\\ =6,28\times\dfrac{1+1+1}{4}\\ =6,28\times\dfrac{3}{4}\\ =4,71\)

Đổi 25%,1/4=0,25 ta có:

0,25×6,28+0,25×6,28+0,25×6,28

6,28×(0,25+0,25+0,25

6,28×0,75=4,71

\(25\%\times6,28+\dfrac{1}{4}\times6,28+0,25\times6,28\)

\(=\dfrac{1}{4}\times\dfrac{157}{25}+\dfrac{1}{4}\times\dfrac{157}{25}+\dfrac{1}{4}\times\dfrac{157}{25}\)

\(=\dfrac{1}{4}\times\left(\dfrac{157}{25}+\dfrac{157}{25}+\dfrac{157}{25}\right)\)

\(=\dfrac{1}{4}\times\dfrac{157+157+157}{25}\)

\(=\dfrac{1}{4}\times\dfrac{471}{25}\)

\(=\dfrac{1\times471}{4\times25}\)

\(=\dfrac{471}{100}=4,71\)

  6,28 x 18,24 + 18,24 x 3,72

= ( 6,28 + 3,72 ) x 18,24

=          10         x 1824

=                   182,4

k nha ^_^

\(6,28\times18,24+18,24\times3,72\)

\(=18,24\times\left(6,28+3,72\right)\)

\(=18,24\times10\)

\(=182,4\)

6,28 x 18,24 + 18,24 x 3,72

= 18,24 x ( 6,28 + 3,72 )

= 18,24 x10

=182,4

Ok

3,7 x 6,5 + 3,7 x 3,5 
= 3,7 x ( 6,5 + 3,5 ) 
= 3,7 x 10 
= 37 :))

\(=3,7\left(6,7+3,5\right)\)

\(=3,7\times10,2=37,74\)

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