DEVOIRS  Math 7E - Duotang for Mental Math               - Calculator (if you do not have one)               - P.58 # 1, 2, 3   Math 7L - Duotang for Mental Math               - Calculator (if you do not have one) Math 8E - Duotang for Mental Math               - Calculator (if you do not have one)               - P.261 # 11, 13, 15 Math 8F - Duotang for Mental Math               - Calculator (if you do not have one)               - P.261 # 11, 13, 15