What is 305 * 70 and how does it affect the final sum with 143?
Executive summary
The arithmetic product 305 × 70 equals 21,350, and adding 143 gives a final sum of 21,493; this calculation (305·70 = 21,350; 21,350 + 143 = 21,493) is consistent with standard multiplication and is shown explicitly in an algebra solver cited in the search results [1]. Sources in the set also show similar step breakdowns for the expression 143 + 30570 [2] [1].
1. Clear result: multiply then add — the straightforward math
When you compute 305 times 70 you get 21,350, and then add 143 to reach 21,493; an online algebra tool lists 305·70 = 21,350 and the full expression 143 + 305·70 = 21,493 [1]. Multiple solver pages for the same expression show the identical procedure and result, confirming the conventional order of operations (multiply before add) used here [2] [1].
2. Why order of operations matters — what the solvers show
The expression 143 + 305 70 is evaluated by performing the multiplication first (305 70 = 21,350) and then adding 143, yielding 21,493; symbolic calculators in the search results demonstrate those steps explicitly, so the computed final sum is not ambiguous under standard arithmetic rules [1] [2].
3. Alternative presentations and potential for confusion
Some pages in the results discuss the same numbers in different contexts (tire sizes like “305/70R17”) where “305” and “70” are not multiplicative factors but parts of a size code; that can cause confusion if someone misreads “305 70” in a tire listing as an arithmetic expression rather than a dimension [3] [4]. The algebra solvers, by contrast, treat them strictly as numeric factors and produce the product 21,350 [1].
4. Confirmations and calculators in the results
Two independent solver links for 143 + 30570 present the same breakdown and final value — Symbolab’s step-by-step page and another solver listing show 305·70 = 21,350 and full sum = 21,493 [2] [1]. These tools are consistent with typical calculator behavior for such linear arithmetic.
5. Edge cases mentioned in sources — significant figures
One source applies significant-figures rules rather than plain arithmetic and reports that calculating 143 + 305 × 70 with certain sig-fig conventions rounds the result to 20,000 (presented as “1 sig fig”) — that is a context-specific transformation for lab-style reporting and not a refutation of the unrounded arithmetic result 21,493 [5]. If your use case demands significant-figure rounding, consult that guidance; otherwise use the exact sum shown by the algebra solvers [5] [1].
6. Practical note: look for context before doing math
Search results show many entries where “305” and “70” appear non-mathematically (tire sizes, ICD codes), so always confirm whether the numbers are meant for arithmetic or are identifiers like “305/70R17” before multiplying [3] [4] [6]. In numeric expressions such as 143 + 30570 found on solver pages, standard arithmetic applies and gives 21,493 [1] [2].
Limitations and transparency: the provided sources are mostly solver pages and unrelated product listings; they confirm the arithmetic result [1] [2] and also show an alternate context-specific rounding convention for significant figures [5]. Available sources do not mention other interpretations of this exact numeric expression beyond standard evaluation, contextual identifiers (like tire sizes), and sig‑fig rounding [3] [4] [5].