怎样简便怎样计算.58×58+58×42 &nbs
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/15 03:06:15
怎样简便怎样计算.
58×58+58×42 | 3874-(874+1000) | 329-38-62 | 347-129-147 |
6000÷125÷8 | 25×125×32 | 95×102 | 360÷45. |
(1)58×58+58×42
=(58+42)×58
=100×58
=5800;
(2)3874-(874+1000)
=3874-874-1000
=3000-1000
=2000;
(3)329-38-62
=329-(38+62)
=329-100
=229;
(4)347-129-147
=347-147-129
=200-129
=71;
(5)6000÷125÷8
=6000÷(125×8)
=6000÷1000
=6;
(6)25×125×32
=25×4×(125×8)
=100×1000
=100000;
(7)95×102
=95×(100+2)
=95×100+95×2
=9500+190
=9690;
(8)360÷45
=360÷(9×5)
=360÷9÷5
=40÷5
=8.
=(58+42)×58
=100×58
=5800;
(2)3874-(874+1000)
=3874-874-1000
=3000-1000
=2000;
(3)329-38-62
=329-(38+62)
=329-100
=229;
(4)347-129-147
=347-147-129
=200-129
=71;
(5)6000÷125÷8
=6000÷(125×8)
=6000÷1000
=6;
(6)25×125×32
=25×4×(125×8)
=100×1000
=100000;
(7)95×102
=95×(100+2)
=95×100+95×2
=9500+190
=9690;
(8)360÷45
=360÷(9×5)
=360÷9÷5
=40÷5
=8.