10.只列式不计算.
①C的5倍5C;
②b与3的和b+3;
③比a少b的数a-b;
④8.4与m的和的一半4.2+0.5m;
⑤x与y的积加上n的2倍xy+2n;
⑥2个b相乘的积减去2个b相加的和b2-2b.
0 162596 162604 162610 162614 162620 162622 162626 162632 162634 162640 162646 162650 162652 162656 162662 162664 162670 162674 162676 162680 162682 162686 162688 162690 162691 162692 162694 162695 162696 162698 162700 162704 162706 162710 162712 162716 162722 162724 162730 162734 162736 162740 162746 162752 162754 162760 162764 162766 162772 162776 162782 162790 199269
①C的5倍5C;
②b与3的和b+3;
③比a少b的数a-b;
④8.4与m的和的一半4.2+0.5m;
⑤x与y的积加上n的2倍xy+2n;
⑥2个b相乘的积减去2个b相加的和b2-2b.