18
35
----
53
18+35=18+30+5=48+5=48+2+3=50+3=53
18+35=18+2+35-2=20+33=53
41
29
----
12
41-29=41-20-9=21-9=21-1-8=20-8=12
41-29=41-1-29-1=40-28=12
70<95<100
300<600<800
15<20<35
0<7<16
170+540:х=260
540:х=260-170
540:х=90
х=540:90
х=6
(4 *209 − 228) / 8 = 76<span>4*209=836
836-228=608
608/8=76
</span>3 * 242 + 824 / 4 <span>= </span><span>932
3*242=726
824/4=206
726+206=932</span>