125 = 45+55+65+75+95+115
12 = 4 ×(4 − 4 ÷ 4) = (44 + 4) ÷ 4
Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
125 = 45+55+65+75+95+115
12 = 4 ×(4 − 4 ÷ 4) = (44 + 4) ÷ 4
Undergraduate Texts in Mathematics
Graduate Studies in Mathematics