脱式计算.(能用简便方法的就用简便方法计算)[8.5-(3.6+3.6)]÷2.6 10.1×8...
脱式计算.(能用简便方法的就用简便方法计算)[8.5-(3.6+3.6)]÷2.610.1×871.4×[(7.5+38.4)÷0.9]....
脱式计算.(能用简便方法的就用简便方法计算)[8.5-(3.6+3.6)]÷2.6 10.1×87 1.4×[(7.5+38.4)÷0.9].
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(1)[8.5-(3.6+3.6)]÷2.6
=[8.5-7.2]÷2.6
=1.3÷2.6
=0.5;
(2)10.1×87
=(10+0.1)×87
=10×87+0.1×87
=870+8.7
=878.7;
(3)1.4×[(7.5+38.4)÷0.9]
=1.4×[45.9÷0.9]
=1.4×51
=71.4.
=[8.5-7.2]÷2.6
=1.3÷2.6
=0.5;
(2)10.1×87
=(10+0.1)×87
=10×87+0.1×87
=870+8.7
=878.7;
(3)1.4×[(7.5+38.4)÷0.9]
=1.4×[45.9÷0.9]
=1.4×51
=71.4.
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