Մաթեմատիկա 5 – Կոտորակների բազմապատկումն ու բաժանումը

1248․
5 x 1/2 = 1/2 + 1/2 + 1/2 + 1/2 + 1/2
3 x 5/2 =  5/2 + 5/2 + 5/2
4 x 6/7 = 6/7 + 6/7 + 6/7 + 6/7
2/5 x 2 = 2/5 + 2/5
4/9 x 5 = 4/9 + 4/9 + 4/9 + 4/9 + 4/9
2/3 x 7 = 2/3 + 2/3+ 2/3 + 2/3 + 2/3 + 2/3 + 2/3

1250. 
3/7 x 5/2 = 21/10
8/3 x 9/7 = 24/63
5/9 x 7/4 = 45/28
6/7 x 3/8 = 42/24
2/9 x 6/17 = 18/102
10/7 x 3/8 = 70/24
4/5 x 21/16 = 20/336
15/14 x 5/3 = 210/15
1251.
5/2 × 7/8 + 3/4 × 9/5 = 283/80
3/8 × 6/5 + 17/6 × 9/10 = 360/120
11/2 × 13/12 + 5/24 × 3/2 = 841/2
81/16 × 8/5 – 3/20 × 11/4 = 615/80
35/4 × 79/15 – 21/3 × 5/4 = 2744/5
13/14 × 68/7 – 97/49 × 9/8 = 2663/392
1259.
2/7 + 1/5 + 4/15 = 79/105
Պատ․ 79/105
1298.
(2/7 + 5/21) = 243/8
(7/12 + 5/18) × 24 – 3/5 × 25/2 = 79/6
(7/9 – 5/36) × 1/23 + (11/3 – 4/9) × 27 = 3133
12/5 × 25/3 × 4/5 + 2/3 × 1/4 × 72 = 28
1319.
2/7 ÷ 3/49 = 98/21
8/25 ÷ 4/5 = 40/100
6/44 ÷ 3/11 = 66/132
144/45 ÷ 12/9 = 1296/540
42/27 ÷ 14/9=  378/378 = 1
72/105 ÷ 8/35 = 3/1
15/8 ÷ 225/64 = 8/15
33/100 ÷ 33/10 = 1/10
1322.
5/11 ÷ 75/22 + 4/3 × 7/5 – 2/3 ÷ 5/7 = 16/15
72/25 ÷ 24/15 + 7/30 × 6/7 + 33/2 × 16/5 = 274/5
10/3 ÷ 15/4 + (3/7 + 13/35) × 21/2 = 418/45
(16/3 – 9/15) ÷ 8/5 + (17/4 – 15/8) ÷ 38/11 = 175/48
(25/3 + 7/2 – 16/15) × 3/4 + 8/7 ÷ 3/14 = 1609/120
5/6 ÷ (1/18 + 8/3) + 7/5 × (13/7 – 1/14) = 275/98
1326.
6/24, 15/24, 8/9

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