Question

Вычисли удобным способам 67+24 48+15 26+39+17 18+68+9 19+28+17+16+15 15 +28+25+10+12

Answer 1

67+24=91
48+15=63
26+39+17=26+39=65+17=82
18+68+9=86+9=95
19+28+17+16+15=19+28=47+17=64+16=80+15=95
15+28+25+10+12=15+28=43+25=68+10=78+12=90