You will add 10 to, add 1 to, subtract 1 from, and subtract 10 from various two digit numbers in this activity. You will not able to use base 10 number blocks to model each equation. The maximum value of each final total will be 99
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
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
U. Solve equations that add two-digit numbers across a 10
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