几道简便方法列竖式15x888+32x0.125x0.2519.98x37-199.8x1.9+1998x0.8225+
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/19 00:13:55
几道简便方法列竖式
15x888+32x0.125x0.25
19.98x37-199.8x1.9+1998x0.82
25+30+35+40…+195+200
15x888+32x0.125x0.25
19.98x37-199.8x1.9+1998x0.82
25+30+35+40…+195+200
15x888+32x0.125x0.25
=15×8×111+4×8×0.125×0.25
=120×(100+10+1)+(1×1)
=12000+1200+120+1
=13321
19.98x37-199.8x1.9+1998x0.82
=19.98×37-19.98×19+19.98×82
=19.98×(37-19+82)
=19.98×100
=1998
25+30+35+40…+195+200
=(25+200)×36÷2
=225×36÷2
=4050
=15×8×111+4×8×0.125×0.25
=120×(100+10+1)+(1×1)
=12000+1200+120+1
=13321
19.98x37-199.8x1.9+1998x0.82
=19.98×37-19.98×19+19.98×82
=19.98×(37-19+82)
=19.98×100
=1998
25+30+35+40…+195+200
=(25+200)×36÷2
=225×36÷2
=4050
几道简便方法列竖式15x888+32x0.125x0.2519.98x37-199.8x1.9+1998x0.8225+
0.9x0.9x0.9用简便方法计算
1.3X+(2000-X)X1.2X0.9-2000=277
0.99x0.75简便计算怎么写?0.94x2.2+4.4x0.03如上
几道的简便计算题9999X7778+3333X6666 5.6X69.32+138.64X0.05+693.2X0.43
用简便方法计算7.2x1.47+14.7x0.28用简便方法计算
128X0.125*0.25/4怎样用简便方法算?
5.4x19.9x0.54用简便方法计算
0.027+9.9x0.27简便计算要过程
(2.4+0.6÷3)x1.5-1.5x0.6这题如何用简便方法计算?
数学题解答用简便方法计算下面各题.2.5x4.4 32x0.25x12.5 3.64x0.8+6.36x0.8-3.8
2.5x1.25x0.8x0.4 简便计算,第一个必采纳.