How many blocks do you count?

Here are the solutions to the problems:

• How many blocks do you count?

  • There are 8 hundreds blocks, 4 tens blocks, and 5 ones blocks.
  • Total blocks: $8 \times 100 + 4 \times 10 + 5 \times 1 = 800 + 40 + 5 = 845$.
  • Answer: $\boxed{\text{845}}$
  • How did you count the blocks?
    • Answer: I counted 8 groups of 100, 4 groups of 10, and 5 individual blocks, then added them together.

• Complete the number lines.

  • Number Line 1: $$\boxed{831}, \boxed{832}, 833, \boxed{834}, \boxed{835}, \boxed{836}, 837, 838, \boxed{839}, \boxed{840}$$
  • Number Line 2: $$\boxed{874}, \boxed{875}, 876, \boxed{877}, \boxed{878}, \boxed{879}, \boxed{880}, 881, \boxed{882}, \boxed{883}, \boxed{884}, \boxed{885}, 886, \boxed{887}$$
  • Number Line 3: $$\boxed{841}, \boxed{842}, 843, \boxed{844}, \boxed{845}, 846, \boxed{847}, \boxed{848}, 849, \boxed{850}$$

• Complete the table.

  • Numbers: 856, 853, 855, 851, 857
    • Write from smallest to biggest: $\boxed{851, 853, 855, 856, 857}$
    • Write from biggest to smallest: $\boxed{857, 856, 855, 853, 851}$
  • Numbers: 898, 801, 810, 819, 891
    • Write from smallest to biggest: $\boxed{801, 810, 819, 891, 898}$
    • Write from biggest to smallest: $\boxed{898, 891, 819, 810, 801}$

• Write the following in words.

  • 845: $\boxed{\text{Eight hundred and forty-five}}$