Write the expanded form of the following numbers: (a) 78964 (b) 275312 (c) 36219 (e) 65780 (f) 678592 (g) 753129

Here are the expanded forms of the given numbers.

1. Write the expanded form of the following:

• a) 78964

  $$78964 = 7 \times 10000 + 8 \times 1000 + 9 \times 100 + 6 \times 10 + 4 \times 1$$ $$\boxed{70000 + 8000 + 900 + 60 + 4}$$

• b) 275312

  $$275312 = 2 \times 100000 + 7 \times 10000 + 5 \times 1000 + 3 \times 100 + 1 \times 10 + 2 \times 1$$ $$\boxed{200000 + 70000 + 5000 + 300 + 10 + 2}$$

• c) 36219

  $$36219 = 3 \times 10000 + 6 \times 1000 + 2 \times 100 + 1 \times 10 + 9 \times 1$$ $$\boxed{30000 + 6000 + 200 + 10 + 9}$$

2. Write the expanded form of the following:

Note: The instruction for parts (e), (f), (g) states "Write the standard form of the following". However, the numbers provided are already in standard form. Assuming the intent was to ask for the expanded form for consistency with the previous parts of the question, the solutions are provided below.

• e) 65780

  $$65780 = 6 \times 10000 + 5 \times 1000 + 7 \times 100 + 8 \times 10 + 0 \times 1$$ $$\boxed{60000 + 5000 + 700 + 80 + 0}$$

• f) 678592

  $$678592 = 6 \times 100000 + 7 \times 10000 + 8 \times 1000 + 5 \times 100 + 9 \times 10 + 2 \times 1$$ $$\boxed{600000 + 70000 + 8000 + 500 + 90 + 2}$$

• g) 753129

  $$753129 = 7 \times 100000 + 5 \times 10000 + 3 \times 1000 + 1 \times 100 + 2 \times 10 + 9 \times 1$$ $$\boxed{700000 + 50000 + 3000 + 100 + 20 + 9}$$