Stage 2 · The Four Operations & Estimation

2.5.3 Three-Step Mixed Expressions

2.5 Order of Operations & Mental Estimation

Point 3 of 6

2.5.3 Three-Step Mixed Expressions

Core idea

Go one gate at a time — parentheses, then multiply/divide, then add/subtract — and even tangled expressions stay tidy.

Module goal. Establish the order of operations with parentheses, and build practical intuition for mental math and estimation.
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