简便计算,求你们了
分配率:4/9×14/15+4/9÷15101×334/5×99+4/5(5/8+5)×5/75.63×6.34+0.563×36.6乘法结合律:0.25×32×1.25...
分配率:4/9×14/15+4/9÷15 101×33 4/5×99+4/5 (5/8+5)×5/7
5.63×6.34+0.563×36.6
乘法结合律:0.25×32×1.25
连减:8-2/7-5/7
连除:8700÷25÷4
去括号:15.43-(2.6+5.43)
商不变性质:20÷0.25 展开
5.63×6.34+0.563×36.6
乘法结合律:0.25×32×1.25
连减:8-2/7-5/7
连除:8700÷25÷4
去括号:15.43-(2.6+5.43)
商不变性质:20÷0.25 展开
3个回答
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分配率:
4/9×14/15+4/9÷15
=4/9×(14/15+1/15)
=4/9×1
=4/9
101×33
=(100+1)×33
=100×33+33
=3300+33
=3333
4/5×99+4/5
=4/5×(99+1)
=4/5×100
=80
(5/8+5)×7/5
=5/8×7/5+5×7/5
=7/8+5
=5又7/8
5.63×6.34+0.563×36.6
=5.63×6.34+5.63×3.66
=5.63×(6.34+3.66)
=5.63×10
=56.3
乘法结合律:
0.25×32×1.25
=(0.25×4)×(8×1.25)
=1×10
=10
连减:8-2/7-5/7
=8-(2/7+5/7)
=8-1
=7
连除:8700÷25÷4
=870÷(25×4)
=870÷100
=8.7
去括号:15.43-(2.6+5.43)
=15.43-5.43-2.6
=10-2.6
=7.4
商不变性质:20÷0.25
=20×4÷(0.25×4)
=80÷1
=80
4/9×14/15+4/9÷15
=4/9×(14/15+1/15)
=4/9×1
=4/9
101×33
=(100+1)×33
=100×33+33
=3300+33
=3333
4/5×99+4/5
=4/5×(99+1)
=4/5×100
=80
(5/8+5)×7/5
=5/8×7/5+5×7/5
=7/8+5
=5又7/8
5.63×6.34+0.563×36.6
=5.63×6.34+5.63×3.66
=5.63×(6.34+3.66)
=5.63×10
=56.3
乘法结合律:
0.25×32×1.25
=(0.25×4)×(8×1.25)
=1×10
=10
连减:8-2/7-5/7
=8-(2/7+5/7)
=8-1
=7
连除:8700÷25÷4
=870÷(25×4)
=870÷100
=8.7
去括号:15.43-(2.6+5.43)
=15.43-5.43-2.6
=10-2.6
=7.4
商不变性质:20÷0.25
=20×4÷(0.25×4)
=80÷1
=80
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分配率:4/9×14/15+4/9÷15 =4/9(14/15+1/15)=4/9
101×33 =(100+1) ×33=3300+33=3333
4/5×99+4/5=4/5(99+1)=4/5×100=80
(5/8+5)×7/5=5/8×7/5+5×7/5=7/8+7=7又7/8
5.63×6.34+0.563×36.6=5.63×6.34+5.63×3.66=5.63×(6.34+3.66)=5.63×10=56.3
乘法结合律:0.25×32×1.25 =0.25×4×8×1.25=1×10=10
连减:8-2/7-5/7=8-(2/7+5/7)=8-1=7
连除:8700÷25÷4=8700÷(25×4)=8700÷100=87
去括号:15.43-(2.6+5.43)=15.43-5.43-2.6=10-2.6=7.4
商不变性质:20÷0.25=20÷1/4=20×4=80
101×33 =(100+1) ×33=3300+33=3333
4/5×99+4/5=4/5(99+1)=4/5×100=80
(5/8+5)×7/5=5/8×7/5+5×7/5=7/8+7=7又7/8
5.63×6.34+0.563×36.6=5.63×6.34+5.63×3.66=5.63×(6.34+3.66)=5.63×10=56.3
乘法结合律:0.25×32×1.25 =0.25×4×8×1.25=1×10=10
连减:8-2/7-5/7=8-(2/7+5/7)=8-1=7
连除:8700÷25÷4=8700÷(25×4)=8700÷100=87
去括号:15.43-(2.6+5.43)=15.43-5.43-2.6=10-2.6=7.4
商不变性质:20÷0.25=20÷1/4=20×4=80
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