計(jì)算小數(shù)乘整數(shù),先按整數(shù)乘法的法則算出積,再看因數(shù)中一共有幾位小數(shù),就從積的右邊數(shù)出幾位,點(diǎn)上小數(shù)點(diǎn)。在運(yùn)算中,乘得的積要點(diǎn)小數(shù)點(diǎn)時(shí),如果乘得的積的小數(shù)位數(shù)不夠時(shí),要在前面用0補(bǔ)足。積點(diǎn)上小數(shù)點(diǎn)后,末...
1、先按照整數(shù)乘法的法則求出積;2、再看被乘數(shù)和乘數(shù)一共有幾位小數(shù),就從積的右邊起數(shù)出幾位,點(diǎn)上小數(shù)點(diǎn);3、如果小數(shù)的末尾出現(xiàn)0時(shí),根據(jù)小數(shù)的基本性質(zhì),把小數(shù)末尾的0劃去。
計(jì)算方法:先通過(guò)移動(dòng)小數(shù)點(diǎn)位置,把小數(shù)擴(kuò)充為整數(shù),再用整數(shù)乘法規(guī)則計(jì)算,最后取結(jié)果時(shí),再看移動(dòng)了幾位,就從積的末位從右往左數(shù)出幾位,點(diǎn)上小數(shù)點(diǎn)。2、小數(shù)乘小數(shù)意義:求一個(gè)數(shù)的幾分之幾是多少。例:整數(shù)部分...
0.46*300=138(1)豎式對(duì)齊方式不同:小數(shù)乘整數(shù)不是相同數(shù)位對(duì)齊;整數(shù)乘整數(shù)是相同數(shù)位對(duì)齊。(2)積的情況不同:小數(shù)乘整數(shù)的積可能是小數(shù),也可能是整數(shù);整數(shù)乘整數(shù)的積一定是整數(shù)。(3)積的末尾有0時(shí),處理方...
小數(shù)乘法的運(yùn)算法則:1、先按照整數(shù)乘法的法則求出積;2、再看被乘數(shù)和乘數(shù)一共有幾位小數(shù),就從積的右邊起數(shù)出幾位,點(diǎn)上小數(shù)點(diǎn);3、如果小數(shù)的末尾出現(xiàn)0時(shí),根據(jù)小數(shù)的基本性質(zhì),把小數(shù)末尾的0劃去。
計(jì)算小數(shù)乘法的方法如下:1、按整數(shù)乘法的法則算出積。2、再看因數(shù)中一共有幾位小數(shù),就從得數(shù)的右邊起數(shù)出幾位,點(diǎn)上小數(shù)點(diǎn)。3、得數(shù)的小數(shù)部分末尾有0,一般要把0去掉。小數(shù)概念:小數(shù)由整數(shù)部分、小數(shù)部分和小數(shù)點(diǎn)...
小數(shù)乘整數(shù)的計(jì)算方法是,先把小數(shù)看成整數(shù),再按整數(shù)乘法算出積,然后看兩個(gè)因數(shù)一共有幾位小數(shù),就從積的右邊數(shù)幾位,點(diǎn)上小數(shù)點(diǎn),并去掉小數(shù)點(diǎn)后末尾的零.
(1)將分?jǐn)?shù)化成小數(shù),再按小數(shù)的乘法法則計(jì)算。如0.21×1/2=0.21×0.5=0.105。(2)將小數(shù)化成分?jǐn)?shù),再按分?jǐn)?shù)的乘法法則計(jì)算。如0.32×3/5=32/100×3/5=8/25×3/5=24/125。(3)小數(shù)與分子直接相乘,再...
小數(shù)乘整數(shù)的計(jì)算法則為先按整數(shù)乘整數(shù)的法則進(jìn)行豎式計(jì)算,再看因數(shù)里有幾位小數(shù),就從積的右邊數(shù)出幾位,點(diǎn)上小數(shù)點(diǎn);小數(shù)乘整數(shù)的意義和整數(shù)乘法的意義相同,是求幾個(gè)相同加數(shù)和的簡(jiǎn)便運(yùn)算,比如1.3×5表示5個(gè)1.3...
先把小數(shù)乘以整數(shù)看成整數(shù)與整數(shù)相乘,再看因數(shù)中一共有幾位小數(shù),就從積的右邊起數(shù)出幾位,點(diǎn)上小數(shù)點(diǎn)。例如: