Three-Digit Place Value — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. What comes next in 120, 140, 160, ___?
A) 170
B) 180
C) 200
D) 260
Each number grows by 20, so 160 plus 20 equals 180, continuing the pattern.
2. What is the pattern rule for 305, 405, 505, 605?
A) Add 10
B) Add 50
C) Add 100
D) Add 200
305 plus 100 equals 405, and each next number grows by 100, so the rule is add 100.
3. What is the missing number in 275, 285, ___, 305?
A) 290
B) 295
C) 300
D) 310
Adding 10 to 285 gives 295, which is between 285 and 305 in this plus-10 pattern.
4. What comes next in 430, 425, 420, 415, ___?
A) 425
B) 420
C) 410
D) 400
Each step subtracts 5, so 415 minus 5 equals 410, continuing the countdown pattern.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Continue the pattern: 150, 250, 350, 450.
350 plus 100 equals 450, so the next number in the plus-100 pattern is 450.
2. Continue the pattern: 206, 216, 226, 236.
Adding 10 to 226 gives 236, continuing the pattern of plus 10.
3. Find the missing number: 512, 517, 522, 527.
512 plus 5 equals 517, which fits between 512 and 522 in a plus-5 pattern.
4. The pattern 400, 395, 390, 385 has a rule of subtract 5.
400 minus 395 equals 5, and every next step drops by 5, so the rule is minus 5.
5. Continue the pattern: 610, 620, 630, 640, 650.
640 plus 10 equals 650, keeping the tens-counting pattern going by one more step.