6,25 X 8 + 6,25 : 0,5

= 6,25 x 8 + 6,25 x 2

= 6,25 x ( 8 + 2)

= 6,25 x 10

= 62,5

`6,25 : 0,25 + 6,25 xx 7 - 6,25`

`= 6,25 : 1/4 + 6,25 xx7-6,25 xx1`

`=6,25 xx 4 + 6,25xx7-6,25xx1`

`=6,25 xx (4+7-1)`

`=6,25 xx10`

`=62,5`.

\(6.25:0.25+6.25\times7-6.25\)

\(=6.25\times4+6.25\times7-6.25\)

\(=6.25\times\left(4+7-1\right)\)

\(=6.25\times10=62.5\)

nguuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

a) \(6,25+8,75+3,75+1,25=6,25+3,75+8,75+1,25=10+10=20\)

b) \(7,15:0,5+7,15x9-7,15=7,15x\left(1:0,5+7,19-1\right)=7,15x\left(2+9-1\right)=7,15x10=71,5\)

`@` `\text {Ans}`

`\downarrow`

`a)`

`6,25 + 8,75 + 3,75 + 1,25 `

`= (6,25 + 3,75) + (8,75 + 1,25)`

`= 10 +10 = 20`

`b)`

` 7,15 \div 0,5 + 7,15 \times 9 - 7,15 `

`= 7,15 \times 2 + 7,15 \times 9 - 7,15 \times 1`

`= 7,15 \times ( 2+ 9 - 1)`

`= 7,15 \times 10`

`= 71,5`

cứu em với

2 x 3,12 x 1,25 : 0,25 x 10

= 6,24    x 1,25 x 4     x 10

= 6,24   x        5          x 10

=         6,24  x       50

=             312

12,48 : 0,5 x 6,25 x 4 x 2

= 12,48 x 2 + ( 6,25 x 4 ) x 2

= 12,48 x ( 2 x 2 ) x 25

= 12,48 x ( 4 x 25 )

= 12,48 x 100

= 1248

2 x 3,12 x 1,25 : 0,25 x 10

= 2 x 3,12 x 1,25 x 4 x 10

= 2 x 3,12 x 5 x 10

= ( 2 x 5 ) x 10 x 3,12

= 100 x 3,12

= 312

83,75 + 46,98 + 6,25 = (83,75 + 6,25) + 46,98 = 90 + 46,98 = 136,98

14,75 + 8,96 + 6,25 = (14, 75 + 6,25) + 8,96

= 21 + 8,96

= 29,96

5,87 + 28,69 + 4,13 = (5,87 + 4,13) + 28,69 = 10 + 28,69 = 38,69.

83,75 + 46,98 + 6,25 = (83,75 + 6,25) + 46,98 = 90 + 46,98 = 136,98.

A 16,10

B 23

a) 6,25 + 3,1 + 8,75 = (6,25+8,75) + 3,1= 15 + 3,1= 18,1

b) 7,8 + 5,6 +6,2 + 3,4 =  (7,8 + 6,2) + (5,6 + 3,4) = 14 + 9 = 23

6,25 + 8,75 + 3,1 = 18,1

7,8+ 6,2+5,6+3,4=19

0,5x0,125x4,8

=(0,5x4,8)x0,125

=24x0,125

=3

32x0,99x25x1,25

=(1,25x32)x(0,99x25)

=40x24,75

=990

thế còn câu thứ 3 hả bn