It is: 1.75
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∙ 6y agoThe number halfway between 18 and 60 is (18 + 60)/2 = 39.
17. A 4x4 rectangle has a perimeter of 16 units and an area of 16 square units. A 3x6 rectangle has a perimeter of 18 units and an area of 18 square units. The number 17 is halfway between 16 and 18.
(13 + 23)/2 = 18
The single number directly between those two numbers is 18.
The number after 17 is 18.
19.5 is halfway between 18 and 21
Halfway between 18 and 28 is (18 + 28) ÷ 2 = 23.
The number halfway between 18 and 60 is (18 + 60)/2 = 39.
It is 20
36
17. A 4x4 rectangle has a perimeter of 16 units and an area of 16 square units. A 3x6 rectangle has a perimeter of 18 units and an area of 18 square units. The number 17 is halfway between 16 and 18.
(14 + 18)/2 = 16
It is: (18+21)/2 = 19.5
(13 + 23)/2 = 18
(5 + 13)/2 = 18/2 = 9
The single number directly between those two numbers is 18.
11.5