用递等式计算,能简便的就用简便方法算:3.62-1.02+0.9820.4-3.975+9.6-6.02584.78-(14.78-9.46)+10.36
用递等式计算,能简便的就用简便方法算:3.62-1.02+0.9820.4-3.975+9.6-6.02584.78-(14.78-9.46)+10.36(3.42+4....
用递等式计算,能简便的就用简便方法算:3.62-1.02+0.9820.4-3.975+9.6-6.02584.78-(14.78-9.46)+10.36(3.42+4.07)+(5.58+6.93)32000÷(25×32)[7539-12×(64+5)]÷(25×4)
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解答:
(2)20.4-3.975+9.6-6.025
=(20.4+9.6)-(3.975-6.025)
=30-10
=20
(3)84.78-(14.78-9.46)+10.36
=(84.78-14.78)+(10.36-9.46)
=70+1
=71
(4)(3.42+4.07)+(5.58+6.93)
=(3.42+5.58)+(4.07+6.93)
=9+11
=20
(5)32000÷(25×32)
=32000÷32÷25
=1000÷25
=40
(6)[7539-12×(64+5)]÷(25×4)
=[7539-828]÷100
=6711÷100
=67.11
解:(1)3.62-1.02+0.98 =3.62+0.98-1.02 =4.6-1.02 =3.58 |
=(20.4+9.6)-(3.975-6.025)
=30-10
=20
(3)84.78-(14.78-9.46)+10.36
=(84.78-14.78)+(10.36-9.46)
=70+1
=71
(4)(3.42+4.07)+(5.58+6.93)
=(3.42+5.58)+(4.07+6.93)
=9+11
=20
(5)32000÷(25×32)
=32000÷32÷25
=1000÷25
=40
(6)[7539-12×(64+5)]÷(25×4)
=[7539-828]÷100
=6711÷100
=67.11
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