#3
1. 1) 9*6=54; 2) 36:6=6; 3) 6*10=60; 4) 24:4=6; 5) 6:6=1;
6) 54+60=114; 7) 114-1= 113
2. 1) 32:8=4; 2) 4*3=12; 3) 12:6=2; 4) 2*7=14; 5) 90-14=76
#4
S= a*b= 6*3= 18 см^2
Р= (а+b)*2= (6+3)*2=18 см
#6
S= S1+S2
S1= a*b= 4*7= 28 дм^2
S2= a*b= 3*2= 6 дм^2
S= 28+6= 34 дм^2