Ответ учителя по предмету Математика
№1.
90 : 45 = 2 (ч.)
Ответ: 2 часа автобус был в пути.
№2.
70154 + 892 + 70452 — 1274 = 140224
70154
+ 892
+ 70452
— 1274
=========
140224
5364 +2837 + 18367 -2458 =24110
5364
+ 2837
+18367
— 2458
========
24110
№3.
240 :3 + 20 — 9 = 80 +20 -9 = 100-9 = 91
2 *(96 — 36:3) = 2 *(96 — 12) = 2*84=168
24*10:8 = 240_8= 30
№4.
Р кв. = 4*8 = 32 (см) -периметр
S кв. = 8*8 = 64 (см²) — площадь
№5.
30 т = (30 *1000) кг = 30000 кг
700 кг = (700 : 100) ц = 7 ц
12 т = (12*10) ц = 120 ц
8 кг = (8*1000) г = 8000 г
№6.
1) 360 : 9 = 40 (км/ч) скорость теплохода
2) 12 * 40 = 480 (км) расстояние, которое прошел теплоход во II день
3) 360 +480 = 840 (км) всего
Ответ: 840 км всего преодолел теплоход за два дня.
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