Back One Less Than/Two Less Than When subtracting, 0, 1, 2, or 3, To solve 8 1, seven is 1 less than 8, – count back from the total. For example, with 10 so 8 1 = 7. – 3, start at the 10, and count back three – numbers, 9, 8, 7. Addition Subtracting From 10 To find the difference for a subtraction fact, This strategy involves visualizing the removal of think of the related addition fact. What goes counters from a 10 frame. with this part to make the total? 7 3 = ? Think 3 + ? = 7. – Since 3 + 4 = 7, then 7 3 = 4. – Back Down From 10 Ten is a friendly number. For 15 6, take off 5 to get to 10. Then take off 1 more to get to 9 – Patterns Use of Related Some facts become easy to remember because Use the relationship between parts and the they follow a pattern. For example, any number whole to figure out other facts. minus itself is always equal to zero. 5 5 = 0 – 12 12 = 0 2 + 8 = 10 and 8 + 2 = 10 – 10 2 = 8 and 10 8 = 2 – –
Back When subtracting, 0, 1, 2, or 3, count back from the total. For example, with 10 – 3, start at the 10, and count back three numbers, 9, 8, 7. One Less Than/Two Less Than To solve 8 – 1, seven is 1 less than 8, so 8 – 1 = 7. Addition To find the difference for a subtraction fact, think of the related addition fact. What goes with this part to make the total? 7 – 3 = ? Think 3 + ? = 7. Since 3 + 4 = 7, then 7 – 3 = 4. Subtracting From 10 This strategy involves visualizing the removal of counters from a 10 frame. Back Down From 10 Ten is a friendly number. For 15 – 6, take off 5 to get to 10. Then take off 1 more to get to 9 Patterns Some facts become easy to remember because they follow a pattern. For example, any number minus itself is always equal to zero. 5 – 5 = 0 12 – 12 = 0 Use of Related Use the relationship between parts and the whole to figure out other facts. 2 + 8 = 10 and 8 + 2 = 10 10 – 2 = 8 and 10 – 8 = 2
mip-1.6-number-stories.docx