+ 9 + 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 32 21 16 + 7 + 6 + 3 46 53 69 + 2 + 1 + 6 72 84 57 + 9 + 7 + 5 91 12 27 + 2 + 9 + 9 52 43 34 + 3 + 8 + 2
+ 9 + 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 32 + 7 21 + 6 16 + 3 46 + 2 53 + 1 69 + 6 72 + 9 84 + 7 57 + 5 91 + 2 12 + 9 27 + 9 52 + 3 43 + 8 34 + 2
add_within_100.docx