读图回答下:
实验室用氢氧化钠固体配制0.5mol L﹣1的NaOH溶液500mL,回答下列问题:
—Yes.He needs to eat more food.
340×5=____ 375+245=____ 270÷3=____
897-389=____ 38+58= ____100-60÷5=____