Question

Tính bằng hai cách:

85,35 : 5 + 63,05 : 5                                   

85,35 : 5 + 63,05 : 5                                   

= ....................................

= ....................................

=.....................................

= ....................................

= ....................................

=.....................................

Answer 1

`#3107.101107`

`85,35 \div 5 + 63,05 \div 5`

`= 17,07 + 12,61`

`= 29,68`

____

`85,35 \div 5 + 63,05 \div 5`

$= 85,35 \times \dfrac{1}{5} + 63,05 \times \dfrac{1}{5}$

$= \dfrac{1}{5} \times (85,35 + 63,05)$

$= \dfrac{1}{5} \times 148,4$

$= 0,2 \times 148,4$

$= 29,68$

Answer 2

Cách 1:

85,35 : 5 + 63,05 : 5

=17,07 + 12,61

=29,68

Cách 2:

85,35 : 5 + 63,05 : 5

= (85,35+63,05) :5

=148,4 : 5

=29,68