In this topic, we will learn what a decimal is and how to show it visually and on a number line. We will also add, subtract, multiply, and divide with decimals.
In this topic, we will learn what a decimal is and how to show it visually and on a number line. We will also add, subtract, multiply, and divide with decimals.
Learn how to add decimals, specifically to the tenths. Practice adding whole numbers first, then adding the decimal parts. Learn the concept of carrying over in decimal addition.
To figure out where the decimal belongs in your answer, put your fingers on each decimal in the numbers you multiplied together. Then, trace the decimals until your fingers meet at a corner in the lattice.
Review how the decimal number system works before diving into the binary number system. The decimal number system and binary number system work the same way; the only difference is what each digit represents (0-9 versus 0/1).
How do I compare two decimals? To compare two decimals, we can look at the whole numbers before the decimal point. If one of these is larger, we know that number is larger overall. If the whole numbers are the same, we can compare the decimal digits, starting on the left.
If it was two times three, we'd get to six. If it was three times four, we'd get to 12. So it'd be in between those. So the only place to put the decimal here, that'd be in between six and 12 would be right over there. But why does that make sense? Well, one way to think about it is to go from 3.45 to 345, we would have to multiply by a hundred.
