Question

tính hợp lí

5.19+5.81.10=

37.54+37.45
+37=

7.32+14.34=

Answer 1

`@` `\text {Ans}`

`\downarrow`

\(5\cdot19+5\cdot81\cdot10\)

`=`\(5\cdot\left(19+81\cdot10\right)\)

`=`\(5\cdot\left(19+810\right)\)

`=`\(5\cdot829\)

`= 4145`

____

\(37\cdot54+37\cdot45+37\)

`=`\(37\cdot\left(54+45+1\right)\)

`=`\(37\cdot100\)

`= 3700`

____

`7*32 + 14*34`

`= 7*2*16 + 7*2*34`

`= (7*2)*(16+34)`

`= 14*50`

`= 700`

Answer 2

5.19+5.81.10

=5.(19+81).10

=5.100.10

=500.10

=5000

xong:)

 

Answer 3

37.54+37.45+37

=37.(54+45+1)
=37.100

=3700

7.32+14.34

=224+476

=700

Answer 4

viết thiếu r