There are two 25s in 50 and there are four 25s in 100. If you remember this, it helps you count in steps of 25. Look at this number line. With every two steps of 25 there is a bigger step of 50.

Look at the number line and count the steps, following the arrow jumps: 0 to 5 → 5 to 10 → 10 to 15 → 15 to 20 → 20 to 25 →> 25 to 30 Can you see that there are 6 jumps of 5? So there ...