Arithmetic Teacher (1981-1982) Vol. 29, No. 9

  • Arithmetic Teacher (1981-1982) Vol. 29, No. 9

    a e e 0 9 9 9 0 0 0 8 e 8 e 8 e 0 00 000 00 000 0000 7 e 7 e 7 e 000 0000 00000 6 e 6 e 6 e 1+2 + 3 = 6 5 e 5 e 5 e 4 e 4 e 4 e 000 3 e 3 e 3 e 2 e 2 e 2 e 000 1 e 1 e 1 e 3 X (3+ 1) 2 = 6 I ( ] I ~~ • • l c I II 1~m1 II [ ] I l l I BI lg I 1..!..1 0 lq l lSI l SI I : I ~ I ~ I 121 13 1 I I IM~I Cl l:t. l [1 What is yo