Tính bằng hai cách:
85,35 : 5 + 63,05 : 5
85,35 : 5 + 63,05 : 5
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`#3107.101107`
`85,35 \div 5 + 63,05 \div 5`
`= 17,07 + 12,61`
`= 29,68`
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`85,35 \div 5 + 63,05 \div 5`
$= 85,35 \times \dfrac{1}{5} + 63,05 \times \dfrac{1}{5}$
$= \dfrac{1}{5} \times (85,35 + 63,05)$
$= \dfrac{1}{5} \times 148,4$
$= 0,2 \times 148,4$
$= 29,68$
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