89 55 56 + 1 + 5 + 6 38 58 75 + 2 + 2 + 5 Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten. Add within 100 - Composing a 10 62 91 56 + 8 + 9 + 4 76 43 39 + 4 + 7 + 1 52 64 97 + 8 + 6 + 3 41 11 47 + 9 + 9 + 3
89 + 1 55 + 5 56 + 6 38 + 2 58 + 2 75 + 5 Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten. Add within 100 - Composing a 10 62 + 8 91 + 9 56 + 4 76 + 4 43 + 7 39 + 1 52 + 8 64 + 6 97 + 3 41 + 9 11 + 9 47 + 3