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a) \(6,15:0,5+6,15:0,2+3x6,15\)
\(=6,15x\left(1:0,5+1:0,2+3\right)=6,15x\left(2+5+3\right)=6,15x10=61,5\)
b) \(0,215x74,24+25,76x0,215+18,5\)
\(=0,215x\left(74,24+25,76\right)+18,5=0,215x100+18,5=21,5+18,5=40\)
`@` `\text {Ans}`
`\downarrow`
`4,`
`a)`
\( 6,15 \div 0,5 + 6,15 \div 0,2 + 3 \times 6,15 \)
`= 6,15 \times 2 + 6,15 \times 5 + 3 \times 6,15`
`= 6,15 \times (2 + 5 + 3)`
`= 6,15 \times 10`
`= 61,5`
`b)`
`0,215 \times 74,24 + 25,76 \times 0,215 + 18,5 `
`= 0,215 \times (74,24 + 25,76) + 18,5`
`= 0,215 \times 100 + 18,5`
`= 21,5 + 18,5`
`=40`
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`
6,15 : 0,5 + 6,15 : 0,2 + 3 x 6,15
= 6,15 x 2 + 6,15 x 5 + 3 x 6,15
= 6,15 x ( 2 + 3 + 5 )
= 6,15 x 10
= 61,5
\(7,15\div\times0,5+7,15\times9-7,15\\ =7,15\times2+7,15-7,15\\ =7,15\times\left(2+9-1\right)\\ =7,15\times10=71,5\)
`7,15 :0,5 + 7,15 xx 9 - 7,15`
`=7,15 xx 2+7,15 xx 9- 7,15 xx 1`
`=7,15 xx (2+9-1)`
`=7,15 xx 10`
`=71,5`
=7,15:1/2+7,15*9-7,15*1.
=7,15*2+7,15*9-7,15*1.
=7,15*(2+9-1).
=7,15*10.
=71,5.
ko cần tk mk đâu các bn ạ.
Mk tl cho vui thôi nhá.
Chúc mọi người may mắn.
7,15 : 0,5 + 7,15 x 9 – 7,15
= 7,15 x 2 + 7,15 x 9 – 7,15 x1
= 7,15 x ( 2 + 9 – 1)
= 7,15 x 10
= 71,5
\(7,15:0,5+7,15\times9-7,15\)
\(=7,15\times2+7,15\times9-7,15\times1\)
\(=7,15\left(2+9-1\right)\)
\(=7,15\times10\)
\(=71,5\)
Chúc bạn học tốt
Ta có:
7,15 : 0,5 + 7,15*9- 7,15= 7,15* 2 + 7,15*9-7,15= 7,15(2+9-1)=7,15*10=71,5.
Nhớ k đúng cho mình nha!!!
\(7,15:0,5+7,15.9-7,15\)
\(=7,15.2+7,15.9-7,15\)
\(=7,15.\left(2+9-1\right)\)
\(=7,15.10\)
\(=71,5\)
_Chúc bạn học tốt_
a) 6,15 : 0,5 + 6,15 : 0,2 + 3 x 6,15
= 6,15 x 2 + 6,15 . 5 + 3 x 6,15
= 6,15 x ( 2 + 5 + 3)
= 6,15 x 10
= 61,5
\(a.6,15:0,5+6,15:0,2+3\times6,15\\ =6,15\times2+6,15\times5+6,15\times3\\ =6,15\times\left(2+5+3\right)\\ =6,15\times10\\ =61,5\\ b.3h35p\times4+1h35p\times4\\ =4\times\left(3h25p+1h35p\right)\\ =4\times5h\\ =20h\\ c.6,25+8,75+3,75+1,25\\ =\left(6,25+3,75\right)+\left(8,75+1,25\right)\\ =10+10\\ =20\\ d.0,215\times74,24+25,76\times0,215+18,5\\ =0,215\times\left(74,24+25,76\right)+18,5\\ =0,215\times100+18,5\\ =21,5+18,5\\ =40\\ e.\dfrac{3}{7}:\dfrac{11}{5}+\dfrac{4}{7}:\dfrac{11}{5}\\ =\dfrac{3}{7}\times\dfrac{5}{11}+\dfrac{4}{7}\times\dfrac{5}{11}\\ =\dfrac{5}{11}\times\left(\dfrac{3}{7}+\dfrac{4}{7}\right)\\ =\dfrac{5}{11}\times1\\ =\dfrac{5}{11}\\ g.7,15:0,5+7,15\times9-7,15\\ =7,15\times2+7,15\times9-7,15\\ =7,15\times\left(2+9-1\right)\\ =7,15\times10=71,5\)