2-min Fluency Warm-up — Solve in your head.
10 + 10 =
20 + 20 =
25 + 25 =
50 + 50 =
Estimate First! Look at each pattern. BEFORE you fill in the blanks, predict: will the last number be more or less than 50? Circle your prediction, then solve.
Start at 4, count by 4s (8 numbers).
Prediction: last number is more than 50 / less than 50
4, 8, , , , , ,
Start at 30, count by 5s (8 numbers).
Prediction: last number is more than 50 / less than 50
30, 35, , , , , ,
Fill in the missing numbers. What is the rule for each?
Count by 2:
Count by 5:
Count by 10:
Count by 3:
Find the rule, then write the next number.
12, 14, 16, 18,
Rule:
40, 35, 30, 25,
Rule:
11, 21, 31, 41,
Rule:
60, 57, 54, 51,
Rule:
Read carefully. Think about what is happening. Draw if it helps!
Zoe saves money in a pattern: $2 the first week, $4 the second week, $6 the third week. If the pattern continues, how much will she save in the sixth week?
Draw or write your thinking:
$