Question

300×2+50-3×20+50=? 630+300+20-630-30+200=? 700-(250+50)-400=?

Answer 1

Ответ:

1)640

2)490

3)0 (прошу)

Answer 2

Ответ:

Пошаговое объяснение:

Answer 3

Let's solve these mathematical expressions step by step:

1. $300 \times 2 + 50 - 3 \times 20 + 50$ First, perform the multiplications and then the additions/subtractions: $600 + 50 - 60 + 50$ Now, add and subtract from left to right: $600 + 50 = 650$ $650 - 60 = 590$ $590 + 50 = 640$

   So, $300 \times 2 + 50 - 3 \times 20 + 50 = 640$.

2. $630 + 300 + 20 - 630 - 30 + 200$ Start by adding and subtracting from left to right: $630 + 300 = 930$ $930 + 20 = 950$ $950 - 630 = 320$ $320 - 30 = 290$ $290 + 200 = 490$

   Therefore, $630 + 300 + 20 - 630 - 30 + 200 = 490$.

3. $700 - (250 + 50) - 400$ First, calculate the sum inside the parentheses: $250 + 50 = 300$ Now, subtract the sum from 700: $700 - 300 = 400$ Finally, subtract 400 from 400: $400 - 400 = 0$

   So, $700 - (250 + 50) - 400 = 0$.