Question

Calculeaza si efectueaza proba prin operatia inversa:124+438;483+167;486+139;235-118;138-61;700-345

Answer 1

124 + 438 = 562 
Proba: 562 - 438 = 124

483 + 167 = 650 
Proba: 650 - 167 = 483

486 + 139 = 625 
Proba: 625 - 139 = 486

235 - 118 = 117
Proba: 117 + 118 = 235

138 - 61 = 77
Proba:77 + 61 = 138

700 - 345 = 355
Proba: 355 + 345 = 700

Answer 2

$124 + 438 = 562$
$Proba => 562 - 438 = 124$

$483 + 167 = 650$
$Proba => 650 - 167 = 483$

$486 + 139 = 625$
$Proba => 625 - 139 = 486$

$235 - 118 = 117$
$Proba => 117 + 118 = 235$

$138 - 61 = 77$
$Proba => 77 + 61 = 138$

$700 - 345 = 355$
$Proba => 355 + 345 = 700$