4. Start at 3090 and count in these intervals. \( \begin{array}{ll}\text { a) } 50 \text { s up to } 3440 & \text { b) } 5 \text { s up to } 3115 \\ \text { 5. Copy and complete the following by filling in the missing } \\ \text { numbers: } \\ \begin{array}{ll}\text { a) Count in } 25 \mathrm{~s} \text { : } \\ 8525,8550, \square, \square, 8625, \square, \square, \square, 8725 \\ \text { b) Count backwards in } 2 \mathrm{~s} \text { : }\end{array}\end{array} \begin{array}{l}\text { b) }\end{array} \)

Sure, I'd be happy to help you with these counting exercises. Let's break down each problem step by step. --- ### **Problem 4: Start at 3090 and Count in These Intervals** **a) Count by 50's up to 3440** **Starting Number:** 3090 **Interval:** 50 **Goal:** Count up to 3440 **Steps:** 1. **Start at 3090.** 2. **Add 50 each time until you reach or exceed 3440.** **Counting Sequence:** - 3090 - 3140 (3090 + 50) - 3190 (3140 + 50) - 3240 (3190 + 50) - 3290 (3240 + 50) - 3340 (3290 + 50) - 3390 (3340 + 50) - 3440 (3390 + 50) **Final Sequence:** 3090, **3140**, **3190**, **3240**, **3290**, **3340**, **3390**, **3440** --- **b) Count by 5's up to 3115** **Starting Number:** 3090 **Interval:** 5 **Goal:** Count up to 3115 **Steps:** 1. **Start at 3090.** 2. **Add 5 each time until you reach or exceed 3115.** **Counting Sequence:** - 3090 - 3095 (3090 + 5) - 3100 (3095 + 5) - 3105 (3100 + 5) - 3110 (3105 + 5) - 3115 (3110 + 5) **Final Sequence:** 3090, **3095**, **3100**, **3105**, **3110**, **3115** --- ### **Problem 5: Copy and Complete by Filling in the Missing Numbers** **a) Count in 25's** **Given Sequence:** 8525, 8550, □, □, 8625, □, □, □, 8725 **Interval:** 25 **Steps to Fill in the Blanks:** 1. **Identify the interval:** Each number increases by 25 from the previous number. 2. **Fill in the missing numbers step by step.** **Filling the Sequence:** - **8525** - **8550** (8525 + 25) - **8575** (8550 + 25) → □ = 8575 - **8600** (8575 + 25) → □ = 8600 - **8625** (8600 + 25) - **8650** (8625 + 25) → □ = 8650 - **8675** (8650 + 25) → □ = 8675 - **8700** (8675 + 25) → □ = 8700 - **8725** (8700 + 25) **Completed Sequence:** 8525, 8550, **8575**, **8600**, 8625, **8650**, **8675**, **8700**, 8725 --- **b) Count Backwards in 2's** *(Assuming the sequence starts at a number and decreases by 2 each time. Since the exact starting number and blanks aren't provided, I'll provide a general method and an example.)* **Example Sequence (Fill in the missing numbers):** Suppose the sequence is: 10, □, 6, □, 2 **Interval:** -2 (counting backwards by 2) **Steps to Fill in the Blanks:** 1. **Start at 10.** 2. **Subtract 2 each time to get the next number.** **Filling the Blanks:** - 10 - **8** (10 - 2) → □ = 8 - 6 - **4** (6 - 2) → □ = 4 - 2 **Completed Sequence:** 10, 8, 6, 4, 2 --- **If you provide the specific starting number and the positions of the blanks for part b, I can give a more tailored solution.** --- Feel free to ask if you need further clarification or assistance with these problems!