问题标题:
急需300道四年级递等式计算题!要难些,不要有乘除,最好能简便要有小数点
问题描述:
急需300道四年级递等式计算题!要难些,不要有乘除,最好能简便
要有小数点
李长云回答:
23.5+14.8+36.5
=23.5+36.5+14.8
=60+14.8
=74.8
19.4+30.6+45.62
=50+45.62
=95.62
33.5+24.9+51.3
=58.4+51.3
=109.7
39.7×2.8+3.97×72
=3.97×10×2.8+3.97×72
=3.97×28+3.97×72
=3.97×(28+72)
=3.97×100
=397
32×1.2×52
=38.4×52
=1996.8
1.2×2+2.8×2
=【1.2+2.8】×2
=4×2
=8
2.5×2-1.5×2
=[2.5-1.5]×2
=1×2
=2
1.3/7×49/9-4/3
2.8/9×15/36+1/27
3.12×5/6–2/9×3
4.8×5/4+1/4
5.6÷3/8–3/8÷6
6.4/7×5/9+3/7×5/9
7.5/2-(3/2+4/5)
8.7/8+(1/8+1/9)
9.9×5/6+5/6
10.3/4×8/9-1/3
11.7×5/49+3/14
12.6×(1/2+2/3)
13.8×4/5+8×11/5
14.31×5/6–5/6
15.9/7-(2/7–10/21)
16.5/9×18–14×2/7
17.4/5×25/16+2/3×3/4
18.14×8/7–5/6×12/15
19.17/32–3/4×9/24
20.3×2/9+1/3
21.5/7×3/25+3/7
22.3/14××2/3+1/6
23.1/5×2/3+5/6
24.9/22+1/11÷1/2
25.5/3×11/5+4/3
26.45×2/3+1/3×15
27.7/19+12/19×5/6
28.1/4+3/4÷2/3
29.8/7×21/16+1/2
30.101×1/5–1/5×21
.用简便方法计算:
(1)3786-499
2)32×25×125
(3)1653-338-662
(4)7987+350+2013+450
(5)38×38+62×38
(6)452+99×452
(7)201×79
(8)50×125×4×8
计算下面各题:
(1)340×(120-40÷8)
(2)45×(720-1957÷19)
(3)86+[4500+(2088÷36)÷2]
(4)396×[74-(4875÷15-13×21)]
(5)[1054-(174-168)]÷8
(6)6048÷[(107-99)×9]
(7)(79+92+121)+108
(8)(37+56+63)+44=
要我的求求你了,我找了好久
点击显示
数学推荐
热门数学推荐