问题
解答题
选择你喜欢的方法计算 (1)4500+500÷25 (2)907×101-907 (2)0.5×[12.2÷(3.7+2.4] (4)(
|
答案
(1)4500+500÷25,
=4500+20,
=4520;
(2)907×101-907,
=907×(101-1),
=907×100,
=90700;
(2)0.5×[12.2÷(3.7+2.4)],
=0.5×[12.2÷6.1],
=0.5×2,
=1;
(4)(
3 |
8 |
1 |
5 |
7 |
15 |
=
3 |
8 |
1 |
5 |
7 |
15 |
=15+8+
7 |
15 |
=23
7 |
15 |