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脱式计算(能简便算的要简便算) ...

(1)0.01+1.01×99,=0.01+1.01×(100-1),=0.01+1.01×100-1.01×1,=101+0.01-1.01,=100;(2)26×20.2-8.4-1.8,=26×(20+0.2)-(8.4+1.8),=520+5.2-10.2,=525.2-10.2,=515;(3)89.3×43+38×89.3+893×1.9,=89.3×43+38×89.3+89.3×19,=...

①12× 3 8 ÷ 3 4 =12× 3 8 × 4 3 =6;② 4 9 + 5 9 ×9= 4 9 +5=5 4 9 ;③14÷( 1 3 + 5 6 )× 3 4 =14÷ 7 6 × 3 4 =14× 6 7 × 3 4 =9;④3.6-2.8+16.4-7.2=(3.6+16.4)-(2.8+7.2)=20-10=10;⑤77× 4 5 +23×0.8=(77+23)×0.8=100×0.8=80.

①0.25×0.975×40=0.25×40×0.975=10×0.975=9.75;②0.89×4.8+0.89×5.2=0.89×(4.8+5.2)=0.89×10=8.9;③(8+0.8)×1.25=8×1.25+0.8×1.25=10+1=11;④10-0.38-0.62=10-(0.38+0.62)=10-1=9;⑤45.3×101-45.3=45.3×(101-1)=45.3×100=4530;⑥1.25×0.2...

成语小故事----疑邻盗斧 从前有个乡下人,丢了一把斧子。他以为是邻居家的儿子偷去了,于是处处注意那人的一言一行,一举一动,越看越觉得那人像是盗斧的贼。后来,丢斧子的人找到了斧子,原来是前几天他上山砍柴时,一时疏忽失落在山谷里。找到...

2.5×0.32×125 =(2.5×0.4)×(0.8×125) =1×100 =100 907×99+907 =907×(99+1) =907×100 =90700 (1/3+1/4+1/5)×60 =(1/3)×60+(1/4)×60+(1/5)×60 =20+15+12 =47 [(1/7)-(1/9)]×63-(2/3) =(1/7)×63-(1/9)×63-(2/3) =9-7-(2/3) =1又1/3 (3/5)×[(2/8...

3.6×2.5 =4×0.9×2.5 =(4×2.5)×0.9 =10×0.9 =9

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400除25 =4x100÷25 =4x(100÷25) =4x4 =16 请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!谢谢管理员推荐采纳!! 朋友,请【采纳答案】,您的采纳是我答题的动力,如果没有明白,请追问。谢谢。

(1)8.08×1.25=(8+0.08)×1.25=8×1.25+0.08×1.25=10+0.1=10.1(2)49.5×101-49.5=49.5×(101-1)=49.5×100=4950(3)4.6+5.6×0.83=4.6+4.648=9.248(4)12.8+2.04×9.5=12.8+19.38=32.18(5)22-1.6×7 =22-11.2=10.8(6)2.5×0.6-1.8×0.5=1.5-0...

3.26×9.9=3.26+=3.26×10-3.26×0.1=32.6-0.326=32.274

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