1. -10 + (-6) + 9 – (-18) + 9

-10 + (-6) + 9 – (-18) + 9
= -16 + 9 – (-18 ) + 9
= -7 – (-18) + 9
= 11 + 9
= 20

Jika puas dengan jawaban saya , tolong jadikan jawaban terbaik❤

-10 + (-6) + 9 – (-18) + 9
= – 10 – 6 + 9 + 18 + 9
= 20