四年级期末考试前计算(答案)

更新时间:2024-04-07 05:28:01 阅读量: 综合文库 文档下载

说明:文章内容仅供预览,部分内容可能不全。下载后的文档,内容与下面显示的完全一致。下载之前请确认下面内容是否您想要的,是否完整无缺。

一、直接写得数

10-0.09= 9.91 322-99=223 1-0.01= 0.99 3.8+0.12=3.92 10-6.5+3.5=7 99×8+8=800 67-23+37=81 32-18+56=70 1200÷25÷4=12 4.6-3=1.6 0.28+0.2=0.48 7+2.3=9.3 25×4=100 24×5=120 二、简算 57×101-57 =57×(101-1) =57×100 =5700

57×102

=57×(100+2) =57×100+57×2 =5700+114 =5814

89×101

=89×(100+1) =89×100+89×1 =8900+89 =8989

89×99

=89×(100-1) =89×100-89×1 =8900-89 =8811

57×99+57 =57×(99+1) =57×100 =5700

487-(187+166) =487-187-166 =300-166 =134

(40-3)×25 =40×25-3×25 =1000-75 =925

(125+70)×8 =125×8+70×8 =1000+560 =1560

(125×70)×80 =125×70×80 =125×80×70 =10000×70 =700000

125×56 =125×8×7 =1000×7 =7000

887×25-87×25 =(887-87)×25 =800×25 =20000

196+196×99 =196×(1+99) =196×100 =19600

120÷5+380÷5 =(120+380)÷5 =500÷5 =100

7200÷125÷8 =7200÷(125×8) =7200÷1000 =7.2

三、脱式计算 550+230×62÷31 =550+14260÷31 =550+460 =1010

35×(570-528)÷14 =35×42÷14 =1470÷14

=105(此题好多同学105的0忘记写)

本文来源:https://www.bwwdw.com/article/cjar.html

Top