For this round, we finish our 5A book and we just started 5B after we finish 5A. The first capture of this book is Decimal. We also need decimal in our daily life. When we are shopping or cooking something. For decimal, I can say that dividing by decimals is the inflexible one. However, it is not too unflexible for me it just the hardest one. Learning decimals is joyful sometimes but, sometimes it also unflexible too. But, if you are into it enjoy learning it you will good at it.