直接寫(xiě)得數(shù):
1-
1
2
=
3
4
×
8
7
=
1
9
÷2÷
1
9
=
2×80%=
1
6
+
5
6
=
15÷
3
5
=
35×
3
14
=
1
2
×
1
3
÷
1
2
×
1
3
=
分析:分?jǐn)?shù)乘法:分子相乘的積做分子,分母相乘的積做分母;
分?jǐn)?shù)除法:除以個(gè)數(shù)等于乘這個(gè)數(shù)的倒數(shù).
1
2
×
1
3
÷
1
2
×
1
3
先把除法變成乘法,再運(yùn)用乘法結(jié)合律簡(jiǎn)算.
解答:
解:1-
1
2
=
1
2
,
3
4
×
8
7
=
6
7
1
9
÷2÷
1
9
=
1
2
,
2×80%=1.6,
1
6
+
5
6
=1,
15÷
3
5
=25,
35×
3
14
=
15
2
,
1
2
×
1
3
÷
1
2
×
1
3
=
1
9
點(diǎn)評(píng):本題考查了簡(jiǎn)單的分?jǐn)?shù)計(jì)算,計(jì)算時(shí)要細(xì)心,注意把結(jié)果化成最簡(jiǎn)分?jǐn)?shù).
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

直接寫(xiě)得數(shù).
1-0.007= 0×0.78= 4×0.9×2.5= 5.2÷0.5÷4=
0.87+0.01= 2.5÷0.1= 8×0.5÷8×1.6= 4.8÷0.3=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

直接寫(xiě)得數(shù):
1.25×8= 5×2.4= 0.36÷3.6= 5.6+4.04= 4.6×0.1=
72.5÷0.01= 0.8×0.05= 6.04-0.4=1÷4= 48.9-(8.9+4.96)= 27.5×11÷27.5×4=

查看答案和解析>>

同步練習(xí)冊(cè)答案
闂傚倸鍊搁崐鐑芥嚄閼哥數浠氬┑掳鍊楁慨瀵告崲濮椻偓閻涱喛绠涘☉娆愭闂佽法鍣﹂幏锟� 闂傚倸鍊搁崐鎼佸磹閹间礁纾归柟闂寸绾捐鈹戦悩鍙夋悙缂佺媭鍨堕弻銊╂偆閸屾稑顏�