tolong di jawab pakai cara ya

1.) 89 × 64 = 5696
2.) 85 × 84 = 7140
3.) 96 × 28 = 2688
4.) 63 × 79 = 4977
5.) 91 × 26 = 2366
6.) 2,9 × 0,6 = 1,74
7.) 8,7 × 4,5 = 39,15
8.) 6,35 × 2,3 = 14,605
9.)12,56 + 8,4 = 20,96
10.) 13,89 + 7,584 = 21,474

1.89.64=5696
2.85.84=7140
3.96.28=2688
4.63.79=4977
5.95.26=2470 /95.25=2375
6.2,9.0,6=1,74
7.8,7.4,5=39,15
8.6,35.2,3=14.605
9.12,56+8,4=20,96
10.13,89+7,584=21,474
11.12,7-5,84=6,86
12.15,7-4,862=10,838
13.728:28=26
14.507:13=39
15.1802:53=34
16.1316:47=28
17.3240:72=45
18.1,25.10=12,5
19.3,27.100=327
20.3,254.1000=3254
21.3,567.10000=35670

terimah kasih,semoga membantu