320-221+84:12
99+84:12
99+7
106
320 - ( 120 ,5 + 95 , 25 + 5, 25 ) + 84 : 12
= 320 - 221 + 7
= 99 +7
= 106
\(320-\left(120,5+95,25+5,25\right)+84\div12\)
\(=320-221+7\)
\(=106\)
\(320-\left(120,5+95,25+5,25\right)+84:12\)
\(=320-\left(120,5+100,5\right)+7\)
\(=320-221+7\)
\(=320-\left(220+1\right)+7\)
\(=100-1+7\)
\(=106\)
