600 - х = 90 * 6
600 - х = 540
х = 600 - 540
х= 60
х * 100 = 3400 + 600
х * 100 = 4000
х = 4000 :100
х= 40
Г) ................=1 2/5
1) 5 1/3+2 4/5=5 5/15+2 12/15=7 17/15=8 2/15
2) 8 2/15 : 2 2/25=122/15 * 25/52=(61*5)/(3*26)=305/78
3) 305/78 : 2 9/26=305/78 * 26/61=5/3=1 2/5
д) .................=16 1/3
1) 2 1/2 : 3 3/4=5/2 * 4/15=2/3
2) 10 - 2/3=9 1/3
3) 2 1/2 - 1 1/3=2 3/6 - 1 2/6=1 1/6
4) 1 1/6 *6=7/6 * 6=7
5) 9 1/3+7=16 1/3
е) ...................=40 5/6
1) 6 1/4 * 8=25/4 * 8=25*2=50
2) 3 2/3 * 5 1/2=11/3 * 11/2=121/6=20 1/6
3) 2 2/5 * 4 7/12=12/5 * 55/12=11
4) 50 - 20 1/6+11=40 5/6
3.400г
2,030г
15,000г
1кг=1000г