0.7
?
4
<0.
?
7
?
4
.(判斷對(duì)錯(cuò))
分析:比較兩個(gè)小數(shù)的大小,先看它們的整數(shù)部分,整數(shù)大的那個(gè)數(shù)就大;如果整數(shù)部分相同,十分位大的那個(gè)數(shù)就大.如果十分位上的那個(gè)數(shù)也相同,百分位上的數(shù)大的那個(gè)數(shù)就大,依此類推.
解答:解:因?yàn)?.7
?
4
=0.7444…
0.
?
7
?
4
=0.747474…
所以0.7
?
4
<0.
?
7
?
4
;
故答案為:√.
點(diǎn)評(píng):掌握小數(shù)大小比較的方法和循環(huán)節(jié)的知識(shí),是解答此題的關(guān)鍵.
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800
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=7
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650
650
=1000
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200
=200
50
50
×8=400
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300
300
=700
150
150
÷5=30
300-
200
200
=100
500
500
+500=1000
2000-
2000
2000
=0
300
300
÷6=50
500+
200
200
=700
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1000
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