b)45 x25 = 4*5=20 (bo 25:5=5) c)27x 23= 9*2=18 (27:3=9) d) 14 x 12 = 7*1=7 (14:2=7) e) 310 x 6 = 3/5 * 3 = 9/5 (6:10= 3:5, skróciło przez 2) f) 8 x 1112 = 2* 11/3= 22/3 (8:12 = 2/3, bo skróciło przez4) g) 4 x 2całe i 58 = 4 * 21/8= 1*21/2 = 21/2 (2cale i 5/8= 16/8+5/8=21/8; 4:8= 1/2) h) 3 x 4 całe i 56 3* 29/6= 1*29/2= 29/2 (4cale i 5/6= 24/6+5/6= 29/6;) i) 8 x 1całe i14 8* 5/4 = 2*4=8 jak wyżej j)100 x 3całe i 730 100* 97/30 = 10*97/3 = 970/3 = 323 cale i 1/3 k)20 x 3 całe i 415 20*49/15 = 4*49/3=196/3 = 65 cale i 1/3 l)75 x 2całe i 225 = 75* 52/25= 3*52= 156
b)4/5 x 25 = 4 * 5 = 20 c)27x 2/3 = 9 * 2 = 18 d) 14 x 1/2 = 7 * 1 = 7 e) 3/10 x 6 = 3/5 * 3 = 9/5 = 1 4/5 f) 8 x 11/12 = 2 * 11/3 = 22/3 = 7 1/3 g) 4 x 2 5/8 = 4 * 21/8 = 1 * 21/2 = 10 1/2 h) 3 x 4 5/6 = 3 * 29/6 = 1 * 29/2 = 14 1/2 i) 8 x 1 1/4 = 8 * 5/4 = 2 * 5 = 10 j)100 x 3 7/30 = 100 * 97/30 = 10 * 97/3 = 970/3 = 323 1/3 k)20 x 3 4/15 = 20 * 49/15 = 4 * 49/3 = 196/3 = 65 1/3 l)75 x 2 2/25 = 75 * 52/25 = 3 * 52 = 156
