плиз помогите 1. –(-25)+(-48)
2. –(-20) – 40
3. –(-20)+40
4. –(-20)-(- 40)
5. –(-20)+(- 40)
2. –(-20) – 40
3. –(-20)+40
4. –(-20)-(- 40)
5. –(-20)+(- 40)
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2) -(-20)-40=20-40=-20
3) -(-20)+40=20+40=60
4) -(-20)-(-40)=20+40=60
5) -(-20)+(-40)=20-40=-20