(1)計算小數(shù)加、減法,要把______對齊,也就是把______對齊.得數(shù)的末尾有0,一般要把0______.
(2)根據(jù)8.27-3.56=4.71寫出一道加法算式是______和一道減法算式是______.
解:
(1)計算小數(shù)加、減法,要把小數(shù)點對齊,也就是把相同數(shù)位對齊.得數(shù)的末尾有0,一般要把0去掉.
(2)根據(jù)8.27-3.56=4.71寫出一道加法算式是4.71+3.56=8.27和一道減法算式是8.27-4.71=3.56.
故答案為:小數(shù)點,相同數(shù)位,去掉,4.71+3.56=8.27,8.27-4.71=3.56.
分析:(1)根據(jù)小數(shù)加減法筆算法則進(jìn)行解答;
(2)根據(jù)8.27-3.56=4.71,寫出一道加法算式要根據(jù)差+減數(shù)=被減數(shù)進(jìn)行解答;一道減法算式要根據(jù)被減數(shù)-差=減數(shù)進(jìn)行解答.
點評:計算小數(shù)加減法,只要把小數(shù)點對齊,就是把相同數(shù)位對齊,然后再根據(jù)整數(shù)加減法的計算方法進(jìn)行計算,末尾有0的要去掉;
根據(jù)一道減法算式,根據(jù)差+減數(shù)=被減數(shù),被減數(shù)-差=減數(shù),可以寫出一道加法算式和一道減法算式.