The math ratio formula of grade one is that the left hand hides less than the sign and the right hand hides more than the sign. The big mouth faces a large number, and the sharp mouth faces a decimal number. The left side is greater than the sign; Small on the left, smaller than the size. The greater than sign is on the left and the less than sign is on the right.
It means that if you encounter more fill-in-the-blank questions, you can first extend your right hand and see if your big mouth is facing a large number, so you can be sure that it is greater than the number. The less than sign is just the opposite of the greater than sign. The child holds out his left hand, and the left thumb and forefinger form a less than sign, so we say that the left hand hides the less than sign. A mouth with a larger number points to a larger number, and a sharp mouth with a smaller number points to a smaller number. Usually there are big numbers next to the opening and small numbers next to the tip.