| 例句 |
I did a quick bit of mental arithmetic.我很快地心算了一下。I'm not very good at adding up in my head.我不太擅长心算加法。I think students should be able to perform calculations both mentally and with paper and pencil.我认为学生应该既能用笔和纸进行运算也会心算。Practise mental arithmetic when you go out shopping.外出购物的时候练习一下心算。I did some quick mental maths to work out the difference.我快速心算了一下以得出差值。He's always been good at manipulating numbers in his head.他一直很擅于心算。The boy is good at doing a sum in his head.这男孩善于心算。Pat was reckoning up the cost of everything in her mind.帕特在心算所有的花销。It's all right, I don't need a calculator. I can work it out in my head.没关系，我不需要计算器，我能心算出来。 |