1. Вычислите а) 5 7/12+ 1 1/3 б) 6 3/50- 3 17/75, в)5 6/55+3 9/44-4 7/22.
2 Вычислите а) 2 1/7* 2 4/5 б) 2 1/16: 2 5/14 в) 3 1/6: 2 1/9 *1 5/9
2 Вычислите а) 2 1/7* 2 4/5 б) 2 1/16: 2 5/14 в) 3 1/6: 2 1/9 *1 5/9
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5 7/12+1 1/3=(5+1)+(7/12+1/3)=6+7/12+4/12=6 11/126 3/50-3 17/75=5 53/50-3 17/75=(5-3)+(53/50-17/75)=2+159/150-34/150=2 125/150=2 5/6
5 6/55+3 9/44-4 7/22=(5+3-4)+(6/55+9/44-7/22)=4+(6*4+9*5-7*10)/220=4+(24+45-70)/220=4-1/220=3 219/220
2 1/7*2 4/5=15/7*14/5=(3*5*2*7)/(7*5)=6
2 1/16:2 5/14=33/16:33/14=33/16*14/33=14/16=7/8=0,875
3 1/6:2 1/9*1 5/9=19/6:19/9*14/9=(19*9*14)/(6*19*9)=14/6=7/3=2 1/3