Giải thích các bước giải:
$\text{a, 24×50÷25+13×7}$
$\text{= 24×(50÷25)+91}$
$\text{= 24×2+91}$
$\text{= 48+91}$
$\text{= 139}$
$\text{b, 32+5×13-3×2²}$
$\text{= 32+65-12}$
$\text{= (32-12)+65}$
$\text{= 20+65}$
$\text{= 85}$
$\text{f, ($7^{2003}$+$7^{2002}$)÷$7^{2001}$}$
$\text{= $7^{2003}$÷$7^{2001}$-$7^{2002}$÷$7^{2001}$}$
$\text{= 49-7}$
$\text{= 35}$