SUBJECTS: Maths YEARS: F–2 Learn the "counting back" strategy to help you solve tricky subtraction problems. In this lesson, Miss James demonstrates how to use a number line correctly, and she ...

Addition and subtraction with regrouping using different strategies to solve. In this lesson, students go over addition and subtraction with regrouping using different strategies to solve. Today ...

Mrs. McCartney talks addition with D.C.; practices hopping the numberline with Springling. Join Mrs. McCartney for an addition number talk with D.C.! Get your hopping skills ready so you can see ...

It covers intuitive methods like counting backwards, using number lines, and "counting up," alongside strategies like "Make a 10" and breaking down numbers, all presented with clear examples to ...

The answer will look like this. We can also use numbers instead of counters. This model shows 6 + 3 = 9. You can also use part-whole models to help with addition problems involving bigger numbers.

National 4 Negative numbers Using a number line Negative numbers are mainly used with coordinates and temperature. Use negative numbers in addition and subtraction problems including subtracting a ...

→ 85 - 40 = 45 → 45 - 5 = 40 2. Use Number Line Visualisation Imagine the numbers on a number line and then ‘count-up’ to subtract. Example: 100 - 78 Count from 78 to 100 → 78 to 80 = 2 ...

Christoph Selter, Addition and Subtraction of Three-Digit Numbers: German Elementary Children's Success, Methods and Strategies, Educational Studies in Mathematics, Vol. 47, No. 2 (2001), pp. 145-173 ...

2. Remember that when you use the counting-on strategy to think of the bigger number first. Count out aloud with Miss James as she jumps along the number line.