Question

which number is less than 1.80? 1.89 1.90 1.79 2.78

Explanation:

Step1: Compare 1.89 and 1.80

$1.89 > 1.80$ since the tenths place is 8 for both, but hundredths place 9 > 0.

Step2: Compare 1.90 and 1.80

$1.90 > 1.80$ as tenths place 9 > 8.

Step3: Compare 1.79 and 1.80

$1.79 < 1.80$ because tenths place 7 < 8.

Step4: Compare 2.78 and 1.80

$2.78 > 1.80$ as whole number part 2 > 1.

Answer:

1.79