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五年级数学分数简便计算题100道

4/7+1/14-1/2 =8/14+1/14-7/14 =2/14 =1/7 5/3-3/8-5/8 =5/3-(3/8+5/8) =5/3-1 =2/3 3/5+3/11+7/5+11 =(3/5+7/5)+11+3/11 =2+11+2/11 =13又2/11 3/4-{5/6-1/3} =3/4-(5/6-2/6) =3/4-1/2 =3/4-2/4 =1/4 4. 3/7 × 49/9 - 4/3 5. 8/9 × 15/36 +...

30.8÷[14-(9.85+1.07)] [60-(9.5+28.9)]÷0.18 2.881÷0.43-0.24×3.5 20×[(2.44-1.8)÷0.4+0.15] 28-(3.4+1.25×2.4) 2.55×7.1+2.45×7.1 777×9+1111×3 0.8×〔15.5-(3.21+5.79)〕 (31.8+3.2×4)÷5 31.5×4÷(6+3) 0.64×25×7.8+2.2 2÷2.5+2.5÷2 ...

4/7+1/14-1/2 =8/14+1/14-7/14 =2/14 =1/7 5/3-3/8-5/8 =5/3-(3/8+5/8) =5/3-1 =2/3 3/5+3/11+7/5+11 =(3/5+7/5)+11+3/11 =2+11+2/11 =13又2/11 3/4-{5/6-1/3} =3/4-(5/6-2/6) =3/4-1/2 =3/4-2/4 =1/4

4/7+1/14-1/2 =8/14+1/14-7/14 =2/14 =1/7 5/3-3/8-5/8 =5/3-(3/8+5/8) =5/3-1 =2/3 3/5+3/11+7/5+11 =(3/5+7/5)+11+3/11 =2+11+2/11 =13又2/11 3/4-{5/6-1/3} =3/4-(5/6-2/6) =3/4-1/2 =3/4-2/4 =1/4

2/3-7/8+1/3 =(2/3+1/3)-7/8 =1-7/8 =1/8 5/6-(3/7-1/6) =(5/6+1/6)-3/7 =1-3/7 =4/7 1-1/3-2/3 =1-(1/3+2/3) =1-1 =0 1+3/5-1/10 =1+6/10-1/10 =1+1/2 =1又1/2 3/8-12/13+5/8 =3/8+5/8-12/13 =1-12/13 =1/13 1-(1/2-3/4) =1+3/4-2/4 =1+1/4 =5/...

4/14+8/14=6/7 7/10+2/10=9/10 4/7-3/7=1/7 3/14+7/14=5/7 4/11+5/11=9/11 4/15+2/15=2/5 9/10-3/10=6/10 7/13+5/13=12/13 6/13+5/13=11/13 2/8+3/8=5/8 11.9/13-9/13=0 12. 9/13+3/13= 12/13 13. 11/12-4/12=7/12 14.7/12+3/12=5/6 15.12/15-9/...

30.8÷[14-(9.85+1.07)] [60-(9.5+28.9)]÷0.18 2.881÷0.43-0.24×3.5 20×[(2.44-1.8)÷0.4+0.15] 28-(3.4+1.25×2.4) 2.55×7.1+2.45×7.1 777×9+1111×3 0.8×〔15.5-(3.21+5.79)〕 (31.8+3.2×4)÷5 31.5×4÷(6+3) 0.64×25×7.8+2.2 2÷2.5+2.5÷2 ...

五年级脱式计算题: 5/6+7/9+3/8=()/() 5/8-2/5+1/4=()/() 14/15-(2/3-1/5)=()/() 19/20+(4/5-7/40)=()/() 7/6-(7/10-1/3)=()/() 11/8-(2/3-1/4)=()/() (4+2/7)-(9/14+1/2)=()/() 13/6-(3/4-5/...

先通分,化成六分之二减去六分之二,所以结果是零。

C 分子除以4是分母*4,所以分母总共扩大了4*2倍,分数缩小到了原来的八分之一

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