Adding pairs of two digit numbers will be the focus of this activity. Some problems involve the use of turnaround facts. If you answer a question wrong, you will use base 10 number cubes to help get the question correct
A. Determine a missing round number to 100 on a number line and identify its written name
B. Position round numbers, in both digits and words, on a vertical number line
C. Determine 2-digit totals based on base-10 blocks and place value cards
D. Determine 2-digit totals of objects in ten-frames or base-10 blocks
E. Determine totals by counting objects with or without filling ten-frames
F. Represent a given two-digit number with base-10 blocks
G. Identify 2-digit round numbers
H. Decompose 2-digit numbers into a round number plus ones
I. Determine 2-digit totals of base-10 blocks by counting tens and ones
J. Determine totals by counting tens and ones using scattered and dissimilar objects in ten-frames
K. Decompose 2-digit numbers into tens and ones with and without a model of base-10 blocks
L. Solve +/- 1 and +/- 10 equations with and without a model of base-10 blocks
M. Count forward and backward within a ten on a number line
N. Align a scattered set of numbered, non-sequential objects in ascending order
O. Align a scattered set of numbered, non-sequential objects in descending order
P. Compare 2-digit totals with a set of 10, 5, and 1 coins
Q. Identify missing numbers on a hundred chart
R. Identify 10 less, 10 more, 1 less, and 1 more on a hundred chart with limited numbering
S. Adding round numbers using blocks and bars
T. Addition and subtraction of round numbers
V. Solve equations that add or subtract a round number using a hundred chart
W. Identify missing numbers in columns on a hundred chart with limited numbering
X. Identify 1 more and 10 more on a hundred chart with limited numbering
Y. Complete and solve equations that add or subtract a round number using a hundred chart
Z. Identify missing numbers on a hundred chart and decompose into tens and ones
AA. Count forward across 100 and beyond 100 on a number line
AB. Count backward across 100 and beyond 100 on a number line
AC. Identify a missing three-digit number on a number line and its written name
AD. Determine totals of objects in ten-frames beyond 100
AE. Count base-10 rods beyond 100
AF. Determine totals beyond 100 using a base-10 flat, rods, and cubes