Пошаговое объяснение:
–20+18= –2
–18–15= –33
20–(–1)=20+1=21
30+(–5)=30–5=25
–8,1–1,2= –9,3
–9,3+0,7= –8,6
0,3–1,3= –1
9,8+(1,2)=9,8+1,2=11
8–1,2=6,8
11+(–11,3)=11–11,3= –0,3
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Пошаговое объяснение:
–20+18= –2
–18–15= –33
20–(–1)=20+1=21
30+(–5)=30–5=25
–8,1–1,2= –9,3
–9,3+0,7= –8,6
0,3–1,3= –1
9,8+(1,2)=9,8+1,2=11
8–1,2=6,8
11+(–11,3)=11–11,3= –0,3