a 5 1/2 * (1,5)²-4 5/7 : 1 1/21b (3 3/4 *4/5-4,5:3,5):24
a)5 1/2*(1,5)^ - 4 5/7: 1 1/21= 5 1/2*2 1/4-4 5/7: 1 1/21=11/2 * 9/4-33/7*21/22= 99/8-9/2=99/8- 36/8=63/8=7 7/8
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a)5 1/2*(1,5)^ - 4 5/7: 1 1/21= 5 1/2*2 1/4-4 5/7: 1 1/21=11/2 * 9/4-33/7*21/22= 99/8-9/2=99/8- 36/8=63/8=7 7/8