This is a modification of the Helping With Math tasks, "Number Grid …
This is a modification of the Helping With Math tasks, "Number Grid Puzzles," https://www.helpingwithmath.com/printables/worksheets/numbers/1nbt4-number-grid-puzzles01.htm. This activity was used with a tier 3 fourth grade intervention math group to help students count by tens in mid-decades and count forward and back by ones. I modified this activity by first having students make observations and note patterns in a hundreds chart; specifically encouraging students to note that counting on by ten ones increased the tens digit by one. Students then modeled this concept with base-ten blocks. Finally, students completed the hundreds chart number puzzles to reinforce this concept and wrote matching equations when a puzzle was solved. For example, "47 = 35 + 12."
This lesson was used with a tier 3 fourth grade intervention math …
This lesson was used with a tier 3 fourth grade intervention math group to help students move from counting by tens and ones separately to counting by tens in mid-decades (for example: 44 + 33, students would count 54, 64, 74, 75, 76, 77). I started this lesson by having students explore the columns of a hundreds chart. Students highlighted one column at a time and recited the counting sequence from top to bottom. We then connected the reciting to matching numeric equations. The next step was to use the counting by mid-decade knowledge to solve addition equations. Students used open number lines to model the addition.
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