Try + and - for both numbers. The different signs here represent directions.

Adding decimals with the same sign practice:[br]1) 4.5 + 6.3[br]2) -1.8 + -1.6[br]3) -3.7 + - 6.5[br]4) -15.6 + -14[br]5) 3.3 + 12.8[br][br]Adding decimals with different signs practice:[br]6) -2.5 + 10.7[br]7) 8.2+-17.6[br]8) 9.0+-7.4[br]9) -11.8 + 3.3[br]10) -15.7 + 9.2