Контрольные задания

Вопрос:

Фото задания: Решите уравнения: 2500 − x = 148; x + 455 = 900; 25 489 − x = 5 055; 54 − x = 45; 43 + x = 89; c + 758 = 1 500; 23 − x = 1;…

Фото задания

Решите уравнения: 2500 − x = 148; x + 455 = 900; 25 489 − x = 5 055; 54 − x = 45; 43 + x = 89; c + 758 = 1 500; 23 − x = 1; 30 · x = 270; 360 : c = 6; a · 3 = 120; 720 : c = 80; 150 · c = 450; 3 500 : x = 7; 100 · x = 1 000; 56 − a = 7; 120 : 40 = 3; 500 + x = 1 200; 25 · x = 500; x − 45 = 90; 58 · x = 580; 54 000 − a = 45; a − 66 = 199; 968 + x = 2 100.

2500 − x = 148; x = 2500 − 148 = 2352.
x + 455 = 900; x = 900 − 455 = 445.
25 489 − x = 5 055; x = 25 489 − 5 055 = 20 434.
54 − x = 45; x = 54 − 45 = 9.
43 + x = 89; x = 89 − 43 = 46.
c + 758 = 1 500; c = 1 500 − 758 = 742.
23 − x = 1; x = 23 − 1 = 22.
30 · x = 270; x = 270 : 30 = 9.
360 : c = 6; c = 360 : 6 = 60.
a · 3 = 120; a = 120 : 3 = 40.
720 : c = 80; c = 720 : 80 = 9.
150 · c = 450; c = 450 : 150 = 3.
3 500 : x = 7; x = 3 500 : 7 = 500.
100 · x = 1 000; x = 1 000 : 100 = 10.
56 − a = 7; a = 56 − 7 = 49.
120 : 40 = 3 — верное числовое равенство.
500 + x = 1 200; x = 1 200 − 500 = 700.
25 · x = 500; x = 500 : 25 = 20.
x − 45 = 90; x = 90 + 45 = 135.
58 · x = 580; x = 580 : 58 = 10.
54 000 − a = 45; a = 54 000 − 45 = 53 955.
a − 66 = 199; a = 199 + 66 = 265.
968 + x = 2 100; x = 2 100 − 968 = 1 132.