Вопрос школьника по предмету Математика
Найди устно корни уравнений.
2+б=30. б=_________ (это пример в учебнике а я не понимаю что писать)
5*м=55 ____________
70-с=14 _____________
60:д=5 _____________
а*40=120 _____________
т-39=8 ______________
42:х=14 ___________
к:16=4 _____________
34-у=19 ___________
н+320=410 _________
Ответ учителя по предмету Математика
2+б=30
б=30-2
б=28
5*м=55
м=55:5
м=11
70-с=14
с=70-14
с=56
60:д=5
д=60:5
д=12
а*40=120
а=120:40
а=3
т-39=8
т=8+39
т=47
42:х=14
х=42:14
х=3
к:16=4
к=16*4
к=64
34-у=19
у=34-19
у=15
н+320=410
н=410-320
н=90
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