5.4×[(1.3+2.15)÷0.5]简便计算?
4个回答
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5.4×[(1.3+2.15)÷0.5]=37.26。
简便计算过程如下:
5.4×[(1.3+2.15)÷0.5]
=5.4×(1÷0.5+2÷0.5+0.45÷0.5)
=5.4×(2+4+0.9)
=5.4×6+5.4×(1-0.1)
=32.4+5.4-0.54
=37.8-0.54
=37.26
扩展资料:
乘法:
1)乘法交换律:a*b=b*a
2)乘法结合律:a*b*c=(a*b)*c=a*(b*c)
3)乘法分配律:(a+b)*c=a*c+b*c;(a-b)*c=a*c-b*c
除法:
1)商不变的性质即被除数与除数同乘以或同除以一个数(零除外),商不变。
a/b=(a*n)/(b*n)=(a/n)/(b/n)
2)两个数的和(差)除以一个数,可以用这个数分别去除这两个数(在都能整除的情况下),再求两个商的和(差)。
(a+b)/c=a/c+b/c;(a-b)/c=a/c-b/c
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先算括号里面的,然后一步一步来
5.4×[(1.3+2.15)÷0.5]
=5.4×(1÷0.5+2÷0.5+0.45÷0.5)
=5.4×(2+4+0.9)
=5.4×6+5.4×(1-0.1)
=32.4+5.4-0.54
=37.8-0.54
=37.26
5.4×[(1.3+2.15)÷0.5]
=5.4×(1÷0.5+2÷0.5+0.45÷0.5)
=5.4×(2+4+0.9)
=5.4×6+5.4×(1-0.1)
=32.4+5.4-0.54
=37.8-0.54
=37.26
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展开全部
5.4×[(1.3+2.15)÷0.5]
=5.4×[(1.3+2.15)÷1/2]
=5.4×[(1.3+2.15)×2]
=5.4×[1.3×2+2.15×2]
=5.4×[2.6+4.3]
=5.4×6.9
=(5+0.4)×(7-0.1)
=5×7-0.1×5+7×0.4-0.4×0.1
=35-0.5+2.8-0.04
=37.8-0.54
=37.26
=5.4×[(1.3+2.15)÷1/2]
=5.4×[(1.3+2.15)×2]
=5.4×[1.3×2+2.15×2]
=5.4×[2.6+4.3]
=5.4×6.9
=(5+0.4)×(7-0.1)
=5×7-0.1×5+7×0.4-0.4×0.1
=35-0.5+2.8-0.04
=37.8-0.54
=37.26
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=5.4×【3.45÷0.5】
=5.4×6.9
=37.26
=5.4×6.9
=37.26
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