1)2430*65=157950
2)157950:50=3159
3)3159+18937=22096
4)22096-21960=136
1)45356-6890=38466
2)38466:9=4274
3)4274*350=1495900
4)1495900-9500=1486400
22+х+158=250
х+158=250-22
х+158=228
х=228-158
х=70
400-(200+z)=52
400-200-z=52
200-z=52
z=200-52
z=148
2(y+25)=150
2y+50=150
2y=150-50
2y=100
y=100:2
у=50
1) 126 = 2*3*3*7
84 = 2*2*3*7
2) <span>НОД (126; 84) = 2*3*7 = 42
</span><span>НОК (126; 84) = 126 * 2 = 252</span>
3) 84 / 126 = (2*42) / (3*42) = 2 / 3
4) 17 / 126 + 11 / 84 = (34 + 33) / 252 = 67 /252.