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9.8×7.2+2.3×7.2+4×0.72的简便算法
9.8×7.2+2.3×7.2+4×0.72的简便算法
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第1个回答 2017-12-23
9.8×7.2+2.3×7.2+4×0.72
=7.2X(9.8+2.3+0.4)
=7.2X12.5
=0.9X8X12.5
=0.9X100
=90
本回答被网友采纳
第2个回答 2017-12-23
9.8×7.2+2.3×7.2+4×0.72=7.2*(9.8+2.3+0.4)=7.2*12.5=90
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简便
方法计算下列各题(递等式,求高手,会加悬赏的!看补充!)
答:
① 0.25×(4 - 0.8)×1.25 =0.25×3.2×1.25 =(0.25×4)×(0.8×1.25)=1×1 =1 ②
0.72×
3.6+
7.2×
0.63 =7.2×0.36+7.2×0.63 =7.2×(0.36+0.63)=7.2×0.99 =7.128 ③ 2.3
×9.8+4
.6 =2.3
×9.8+2.3×
2 =2.3×(9.8+2)=...
8.9
×7.2+
0.1×72
的简便算法
答:
8.9
×7.2+
0.1×72 =8.9×7.2+1×7.2 =(8.9+1)×7.2 =9.9×7.2 =(10-0.1)×7.2 =10×7.2-0.1×7.2 =72-
0.72
=71.28
4.5乘以
7.2+
2.8乘以4.4
的简便算法
答:
=
4
.4*(
7.2+
2.8)
+0.72
=44.72
简便
计算题, 悬赏100分!!
答:
=10*8.7 =87 4.2*6.5/1.3 =4.2*(6.5/1.3)=4.2*5 =21 4.6/(0.4*
2.3
)=4.6/2.3*0.4 =2*0.4 =0.8 3.6/4.8*0.8 =3.6*0.8/4.8 =28.8/4.8 =6 (6.
4+
3.2)/8 =6.4/8+3.2/8 =0.8+0.4 =1.2 3.2*0.1+6.32*9 =3.2*0.1+6*9+0...
五年级上册数学
简便
计算大全
答:
简便
计算题:1)6.9
+4
.8+3.1 0.456+6.22+3.78 2)4.02+5.4+0.98 5.17-1.8-3.2 13.75-(3.75—6.48)3)3.68+7.56-2.68 7.85+2.34-0.85+4.66 35.6-1.8-15.6-
7.2
4)3.82+2.9+0.18+9.1 9.6+4.8-3.6 7.14-0.53-2.47 5)...
7.2×
9.9
+0.72×
10怎样
简便
运算?
答:
把9.9拆成(10-0.1)7.2*9.9
+0.72
*10 =7.2*(10-0.1)
+7.2
=7.2*10-7.2*0.1+7.2 =79.2-0.72 =78.48
9.76*0.72-0.76*
0.72+0.72
有什么
简便算法
答:
9.76*0.72-0.76*
0.72+0.72
=(9.76-0.76+1)=10*0.72 =
7.2
七点二加4.28加二点八加
0.72
用
简便算法
。
答:
7.2+4
.28+2.8+
0.72
=(7.2+2.8)+(4.28+0.72)=10+5 =15 你好,本题以解答,如果满意,请点右下角“采纳答案”,支持一下。
小数乘法
简便
运算50道带答案
答:
1.28×8.6
+0.72×
8.612.5×0.96×0.810.
4
-9.6×0.350.25×360.25×0.73×40.32×40346×57+23×860.79×19913.7×0.25-3.7÷42.22×9.9+6.66×6.72.3×16
+2.3×
23+2.3101×0.87-0.91×8710.7×16.1-15.1×10.73.65×4.7-36.5×0.37100道小数
简便
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0.72
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