Add a two-digit number and a two-digit multiple of 10. Begin by using a number bond to break the first number into tens and ones, and adding the tens together. Then, solve these problems without the use of a number bond
A. Relate 1 more or less and 10 more or less to addition and subtraction (Part 1)
B. Relate 1 more or less and 10 more or less to addition and subtraction (Part 2)
C. Identify the rule for a +/- 1 or 10 counting pattern and continue the pattern (Part 1)
D. Identify the rule for a +/- 1 or 10 counting pattern and continue the pattern (Part 2)
E. Record a 2-digit number as tens and ones
G. Subtract a round number from a 2-digit number with and without using number bonds to subtract tens first
H. Add and subtract 2-digit and round numbers including turnaround facts
I. Add 2-digit numbers using place value cards to add tens and ones separately
J. Add 2-digit numbers with and without using number bonds to add on the tens first
K. Subtract 2-digit numbers with and without using place value cards to subtract tens and ones separately
L. Subtract 2-digit numbers with and without using number bonds to subtract the tens first
M. Add 2-digit numbers with and without exchanging using place value cards
N. Add 2-digit numbers with exchanging and without using number bonds
O. Subtract 2-digit numbers with exchanging with and without using number bonds