42+6=48 сложение
42*6=252 умножение
<span>а)1/3=2/6=4/12=5/15=6/18=7/21=8/24
</span>
<span>б)1/4=2/8=3/12=4/16=5/20=6/24=7/28</span>
1. 1038 - <u />х = 602; х = 1038 - 602; х = 436
2. <u />х/3 + 236 = 749; х/3= 749 - 236; х/3 = 513; х = 513*3; х = 1539
3. 2789 - 3х = 1586; 3х = 2789 - 1586; 3х = 1203; х = 1203/2; х = 401
965+839=1804
1200+3600=4800
1804+4800=6604