62 13 26 + 8 + 7 + 4 43 52 17 + 7 + 8 + 3 34 81 38 + 6 + 9 + 2 45 60 59 + 5 + 0 + 1 86 39 90 + 4 + 1 + 0 37 68 71 + 3 + 2 + 9 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 13 + 7 26 + 4 43 + 7 52 + 8 17 + 3 34 + 6 81 + 9 38 + 2 45 + 5 60 + 0 59 + 1 86 + 4 39 + 1 90 + 0 37 + 3 68 + 2 71 + 9 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