Answer:1.Less than <2.Greater than >Step-by-step explanation:1) 4.090_6.090 Step 1: Compare the whole number parts - 4 is less than 6. Step 2: Conclusion - Since 4 is less than 6, 4.090 is less than 6.090. 2) 78.600_78.004 Step 1: Compare the whole number parts - 78 is equal to 78. Step 2: Compare the tenths place - 6 is greater than 0. Step 3: Conclusion - Since 6 is greater than 0, 78.600 is greater than 78.004.