[tex]2. \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ a) \: \: \: 7.3 - 2.45 = 4.82 \\ [/tex]
[tex]б) \: \: \: 2.8 - 0.732 = 2.068[/tex]
[tex]в) \: \: \: 18.4 - 5.803 = 12.597[/tex]
[tex]3.[/tex]
[tex]a) \: \: \: \: \: 4.48 + 2.49 + 1.09 = 6.97 + 1.09 = 8.06[/tex]
[tex]б) \: \: \: \: \: 10.4 - 2.48 + 0.59 = 7.92 + 0.59 = 8.51[/tex]
[tex]в) \: \: \: \: \: 24 .93 + 2.15 - 1.05 + 5.07 = 27.08 - 1.05 + 5.07 = 26.03 + 5.07 = 31.1[/tex]
[tex]г) \: \: \: \: \: 2.531 + 10.859 + 4.469 - 7.759 = 13.39 + 4.469 - 7.759 = 17.859 - 7.759 = 10.1[/tex]
[tex]4. \: \: \: \: \: 23.75 - (x + y) = 23.75 - (8.31 + 9.257) = 23.75 - 17.567 = 6 .183[/tex]
[tex]5.[/tex]
[tex]a)[/tex]
[tex]x + 0.8 = 5.3 \\ x = 5.3 - 0.8 \\ x = 4.5[/tex]
[tex]б)[/tex]
[tex]x - 4.2 = 1.75 \\ x = 1.75 + 4.2 \\ x = 5.95[/tex]
[tex]в)[/tex]
[tex]9.7 - x = 3.812 \\ x = 9.7 - 3.812 \\ x = 5.888[/tex]
[tex]г)[/tex]
[tex](x + 4.2) - 5.7 = 0.95 \\ x + 4.2 = 0.95 + 5.7 \\ x + 4.2 = 6.65 \\ x = 6.65 - 4.2 \\ x = 2.45[/tex]
[tex]д)[/tex]
[tex]18.4 - (x + 3.1) = 10.56 \\ - (x + 3.1) = 10.56 - 18.4 \\ - x - 3.1 = - 7.84 \\ - x = - 7.84 + 3.1 \\ - x = - 4.74 \\ x = 4.74[/tex]
[tex]е)[/tex]
[tex](x - 23.5) + 2.7 = 10.59 \\ x - 23.5 = 10.59 - 2.7 \\ x - 23.5 = 7.89 \\ x = 7.89 + 23.5 \\ x = 31.39[/tex]
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
[tex]2. \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ a) \: \: \: 7.3 - 2.45 = 4.82 \\ [/tex]
[tex]б) \: \: \: 2.8 - 0.732 = 2.068[/tex]
[tex]в) \: \: \: 18.4 - 5.803 = 12.597[/tex]
[tex]3.[/tex]
[tex]a) \: \: \: \: \: 4.48 + 2.49 + 1.09 = 6.97 + 1.09 = 8.06[/tex]
[tex]б) \: \: \: \: \: 10.4 - 2.48 + 0.59 = 7.92 + 0.59 = 8.51[/tex]
[tex]в) \: \: \: \: \: 24 .93 + 2.15 - 1.05 + 5.07 = 27.08 - 1.05 + 5.07 = 26.03 + 5.07 = 31.1[/tex]
[tex]г) \: \: \: \: \: 2.531 + 10.859 + 4.469 - 7.759 = 13.39 + 4.469 - 7.759 = 17.859 - 7.759 = 10.1[/tex]
[tex]4. \: \: \: \: \: 23.75 - (x + y) = 23.75 - (8.31 + 9.257) = 23.75 - 17.567 = 6 .183[/tex]
[tex]5.[/tex]
[tex]a)[/tex]
[tex]x + 0.8 = 5.3 \\ x = 5.3 - 0.8 \\ x = 4.5[/tex]
[tex]б)[/tex]
[tex]x - 4.2 = 1.75 \\ x = 1.75 + 4.2 \\ x = 5.95[/tex]
[tex]в)[/tex]
[tex]9.7 - x = 3.812 \\ x = 9.7 - 3.812 \\ x = 5.888[/tex]
[tex]г)[/tex]
[tex](x + 4.2) - 5.7 = 0.95 \\ x + 4.2 = 0.95 + 5.7 \\ x + 4.2 = 6.65 \\ x = 6.65 - 4.2 \\ x = 2.45[/tex]
[tex]д)[/tex]
[tex]18.4 - (x + 3.1) = 10.56 \\ - (x + 3.1) = 10.56 - 18.4 \\ - x - 3.1 = - 7.84 \\ - x = - 7.84 + 3.1 \\ - x = - 4.74 \\ x = 4.74[/tex]
[tex]е)[/tex]
[tex](x - 23.5) + 2.7 = 10.59 \\ x - 23.5 = 10.59 - 2.7 \\ x - 23.5 = 7.89 \\ x = 7.89 + 23.5 \\ x = 31.39[/tex]