Сколько будет 4*5

Here is a clear, step-by-step solution in English, suitable for a 6th-grade level. Problem: What is 4 × 5? Step 1 — Interpret the expression - 4 × 5 means four groups of five, or five groups of four. The product is the same regardless of how you group it due to the commutative property of multiplication. Step 2 — Repeated addition (a common mental model) - 4 × 5 can be seen as adding 4 together five times: 4 + 4 + 4 + 4 + 4 = 20 Step 3 — Visual/array model (optional) - Imagine an array with 4 rows and 5 columns (or 5 rows and 4 columns). Counting all the dots gives 4 × 5 = 20. Step 4 — Quick check using the table or commutativity - Since multiplication is commutative, 4 × 5 = 5 × 4. - From the basic multiplication table, 5 × 4 = 20, which confirms the result. Answer: 20 If you’d like, I can provide more methods (e.g., doubling, decomposition) or translate this explanation into Russian.