23. 25/100=23. 1/4
23 125/1000=23 1/8
23 1/4+23 1/8=23 2/8+23 1/8=26.3/8
23 1/4-23 1/8=1/8
23 1/4*23 1/8=93/4*185/8=537 21/32
23 1/4:23 1/8=93/4*8/185=186/185=1 1/185
15, 26,37, 48, 59
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Где все я бы тебе решил но надо дописывать
1. 3 7/9 + 5 1/6 = (3 + 5) + (7/9 + 1/6) = 8 + (14/18 + 3/18) = 8 17/18,
2. 8 7/16 + 3 3/10 = (8 + 3) + (7/16 + 3/10) = 11 + (35/80 + 24/80) = 11 79/80,
3. 6 8/12 + 9 7/18 = (6 + 9) + (8/12 + 7/18) = 15 + (24/36 + 14/36) = 15 + 38/36 = 15 + 1 2/36 = 16 1/18,
4. 9 3/6 + 4 7/12 + 3 5/24 = (9 + 4 + 3) + (3/6 + 7/12 + 5/24) = 16 + (12/24 + 14/24 + 5/24) = 16 + 31/24 = 13 + 1 7/24 = 14 7/24.
(670+21)х407=691х407=281237
(258+902)х407=1160х407=472120
5096:(706-69)=5096:637=8
6370:(706-615)=6370:91=70