<span>3т8ц *40=38ц*40=1520ц=152т</span>
2/3x-2/3×3/14=0
2/3x-1/7=0
2/3x=1/7
×=1/7÷2/3
X=1/7×3/2
X=3/14
2)12(x-13/10×5/6)=0
12 (x-13/12)=0
12X-13=0
12X=13
X=13/12
X=1 целых1/12
23/9=2 5/9 ( 23:9=2(ост.5) или 18:9+5:9=2+5/9=2 5/9)
43/12=3 7/12 ( 43:12=36:12+7:12=3+7/12=3 7/12)
1) 323×1/19=323/19=17
2) 35,67÷3×100=11,89×100=1189
3) 742,2÷60×100=12,37×100=1237