Fill in the missing number. a) 425+=700 b) 700-=700 c) 899+1= d) 999+=1000

$$
150 > 145
$$
Your friend has more marbles because 150 is a larger number than 145.  
**Answer:** Your friend has more marbles.

2. To skip count by 5 starting from 95 until 150, you add 5 repeatedly.

$$
95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150
$$
**Answer:** You will say 150.

3. To compare 198 and 189 using place value, look at the digits from left to right.

Both numbers have 1 in the hundreds place.

198 has 9 in the tens place, and 189 has 8 in the tens place. Since $9 > 8$, 198 is greater.
Answer: $\boxed{\text{198}}$ is greater. In the tens place, 9 is greater than 8.

4. To make the biggest number using digits 7, 5, 8 without repeating, arrange them in descending order.

$$
875
$$
**Answer:** The biggest number is $\boxed{\text{875}}$.

PROBLEM SOLVING

1. To find how many pencils are left, subtract the used pencils from the total.

$$
150 - 30 = 120
$$
**Answer:** $\boxed{\text{120 pencils}}$ are left.

2. To find how many stickers Riya has now, add the new stickers to her original amount.

$$
170 + 75 = 245
$$
**Answer:** Riya has $\boxed{\text{245 stickers}}$ now.

3. To find the total number of pages Rohan read, add the pages he read initially and the additional pages.

$$
155 + 35 = 190
$$
**Answer:** Rohan read a total of $\boxed{\text{190 pages}}$.

4. To find how many balloons are still left, subtract the burst balloons from the total.

$$
185 - 55 = 130
$$
**Answer:** $\boxed{\text{130 balloons}}$ are still left.

LOGICAL REASONING

1. Fill the missing number. a) Step 1: Subtract 425 from 700.

   $$700 - 425 = 275$$

   Answer: $425 + \boxed{\text{275}} = 700$

   b) Step 1: To get 700 from 700, you must subtract 0.

   $$700 - 0 = 700$$

   Answer: $700 - \boxed{\text{0}} = 700$

   c) Step 1: Add 1 to 899.

   $$899 + 1 = 900$$

   Answer: $899 + 1 = \boxed{\text{900}}$

   d) Step 1: Subtract 999 from 1000.

   $$1000 - 999 = 1$$

   Answer: $999 + \boxed{\text{1}} = 1000$

2. Which number is greater after addition? a) Step 1: Add 320 and 150.

   $$320 + 150 = 470$$

   b) Step 2: Add 280 and 210.

   $$280 + 210 = 490$$

$$
490 > 470
$$
**Answer:** $\boxed{\text{b) 280 + 210}}$ is greater.

3. If you add 250 and 250, will the answer be more or less than 600?

$$
500 < 600
$$
**Answer:** The answer will be $\boxed{\text{less than 600}}$.

4. Aman added 340+220 and got 650. Is he correct? If not find the correct answer.