1)х=3,8*0,03:1,9=0,06
2)0,3:0,01=27:0,9
0,3:27=0,01:0,9
27:0,3=0,9:0,01
0,3:0,9=27:0,01
| a | 23 cm | 4 m | 8 cm | 8 mm | 10 dm | 10 cm | 900 cm| 30 cm |
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| b | 5 cm | 0.07 cm| 9 cm |50000m| 1 dm | 10 cm | 7 cm | 100 cm |
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| S |115 cm²| 28 cm² | 72 cm²| 400 m²| 10 dm²| 100 cm²| 630 dm²| 300 dm²|
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| P | 56 cm |800.14cm| 34 cm|100000.016m| 22 dm |40 cm|