1) 1, 1\2
2) 9\20
3)3,1\2
4)2, 2\5
5)2
6)6
7)2, 1\2
8) 3,3\5
K×3×4!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
354 = 300 + 50 + 4
642 = 600 + 40 + 2
438 = 400 + 30 + 8
571 = 500 + 70 + 1
634 см = 600 см + 30 см + 4 см = 6 м 3 дм 4 см
829 см = 800 см + 20 см + 9 см = 8 м 2 дм 9 см
1) 2 2/3-1 4/5=8/3-9/5=40/15-27/15=13/15; 2) 6 2/5 - 3 3/4=32/5-15/4=128/20 - 75/20= 53/20=2 13/20; 3)7 2/8 - 2 5/16=58/8 - 37/16=116/16 - 37/16=79/16=4 15/16; 4) 50/12-23/6=50/12-46/12=4/12=1/3; 5) 252/30-77/15=252/30-154/30=98/30=49/15=3 4/15; 6) 156/45-26/15=156/45-78/45=78/45=1 11/15; 7) 138/27-23/9=138/27-69/27=69/27=2 5/9; 8) 703/100-36/10=703/100-360/100=343/100=3 43/100; 9) 143/20-24/5=143/20-96/20=47/20=2 7/20; 10) 49/4-7/2=49/4-14/4=35/4=8 3/4; 11) 103/50-36/25=103/50-72/50=31/50; 12)78/25-12/5=78/25-60/25=16/25