Count Forward & Backward by Fives, Tens, and Hundreds
š¦ Hop, skip, or giant leap! The frog is back, but this time it can leap an entire football field at once by jumping in Hundreds!
Concept
Skip counting by Hundreds is actually the easiest skip counting of all. šÆ **The Hundreds Dial Pattern:** If you start at 342, and jump up by **100s**... * Look at the 3 (the Hundreds place). * Turn the dial up 1 tick! -> 4! * **342 -> 442 -> 542 -> 642**. * The Tens and Ones (the "42") NEVER CHANGE! Only the first number moves! šÆ **Backward Jumps:** If you want to subtract by 10s... just dial the middle number BACKWARD. * **875 -> 865 -> 855 -> 845**.
Try it
Turn the right dial! **Instructions:** Figure out if the frog is jumping by 5s, 10s, or 100s. And is it jumping forward or backward? **Problem 1: 520, ___, 720, 820** * Which dial is changing? The hundreds! It's going up! * Answer: ___ **Problem 2: 480, 470, 460, ___** * The hundreds are perfectly frozen. The tens are changing. * It is going backwards! * Answer: ___ **Problem 3: 155, 160, 165, ___** * The numbers end in 5, then 0, then 5. That is the secret pattern for hopping by 5! * Answer: ___ **Problem 4: 905, 805, ___, 605** * Answer: ___