1. 1) 8m-13m= -5m
5p-p=4p
-5m=4p
2) k-17+k-k+30= k-17+30=k+13
3)-20-6a+8a-48
2. -1,42+3,22=1,8
1,8:(-0,8)=2,25
-6*(-0,7)=4,2
2,25+4,2=6,45
3. -7a+15+1,5a-3,2a-12
1) (12 * 3,13 - 4 * 7,13) - (1 * 5,13 + 3 * 11,13) = 9,04 - 38,52 = - 29,48
<span>2) (3,47 + 3,46) * (3,47 - 3,46) = 6,93 * 0,01 = 0,0693
</span><span>3) (86,9 + 667,6) : (37,1 + 13,2) = 754,5 : 50,3 = 15
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