Question

to subtract 7 from 13 we added .......to 13​

Answer 1

Dear. We need to add [ – ] ( SUBTRACT )

$\huge{ \overline{ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: }}$

$\sf{ \tt{to \: substant \: \red{7} \: from \: 13. }} \\ \sf{ \tt{we \: add \: { \boxed{ \purple{ - }}} \: means \: add \: \orange{subtract \: sign}}}$

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Therefore here we first adding 13 + 13 = 26. then we subtract 26 - 7 = 19.