2-Digit Addends with No Regrouping 2-86
Generalize from adding 2 multiples of 10 like 80+50, to adding 2-digit numbers with no regrouping, like 76+71. Use Base 10 discs and number bonds to show both numbers in expanded form. Since 70+70 = 140, 6+1 = 7, and 140+7 = 147, 76+71 = 147. When ready, transition from Base 10 discs to pictorial number bonds.
