Trace the state's economic history through its primary industries with attention to the labor of multiple communities
Exercise
Difficulty 3
~4 min
hist.g4.f.ex_25
Math Cross Link Computation
Prompt
Math cross-link with multi-digit multiplication (math.g4.f.ns.multi_digit_mult): Using the historical-newspaper economy-section facsimile, compute ONE state-economy figure. Example: if a Central Valley farmer harvested 45 bushels of wheat per acre x 240 acres, how many bushels total?
How it's presented
mode
computation
prompt audio ID
audio.g4f.ex 25.stem
Answer criteria
type
numeric
correct
10800
tolerance
0
Hints
- Use multi-digit multiplication algorithm from Math G4 Fall.
- 45 x 240: break into 45 x 200 + 45 x 40.
Misconceptions to watch
- Computing 45 x 24 instead of 45 x 240 (place-value error)
- Forgetting the partial-product step
- Using addition instead of multiplication
Used in lessons