A warm-up for the start of class, before students play or start the worksheet. It reviews repeated multiplication and powers of 10 using things students see every day, then asks them to think ahead to the first exponent rule. Two tickets print on each page; cut along the dashed line. The answer key prints on its own page after it.

Entry Ticket: Again and Again

Grades 6–8 · Warm-up · Reviews 3.OA.C.7, 4.OA.C.5, 5.NBT.A.2

Name

1. One cell doubles every hour. How many cells after 4 hours?

cells

2. The Sun is about 150,000,000 km away. How many zeros is that? Write 10 × 10 × 10 × 10.

zeros =

3. Find 2 × 2 × 2 and 2 × 3. Are they the same?

and same?

4. Think ahead: 2³ means 2 × 2 × 2. Write out 2³ × 2² the long way. How many 2s are multiplied in all?

Answer Key: Entry Ticket

Again and Again

16 cells (2, 4, 8, 16), which is 2⁴
150,000,000 has 7 zeros; 10 × 10 × 10 × 10 = 10,000
8 and 6; not the same
(2 × 2 × 2) × (2 × 2): five 2s, so 2⁵ = 32. That's today's first rule: add the exponents.

Quick read: 8 on #1 means the student counted the starting cell as hour 1. Students who say 2 × 2 × 2 = 6 on #3 need to write every power out the long way for the first lesson.