Curriculum>Grade 2> Module 4>Topic A: Sums and Differences Within 100

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Practice adding two two-digit numbers by adding the tens, adding the ones, and then adding these two sums. Some problems require regrouping

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

F. Add a round number to a 2-digit number with and without using number bonds to add tens first

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

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

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