4.25×7.1-4.25×5.1的简便计算
能简算的要简算.(1)4.25÷2.5×101-1.7(2)12.8÷[0.5×(23.5-7.5)](3)1.25×7.6-0.25×7.6(4)(8.25-3.75)...
能简算的要简算.
(1)4.25÷2.5×101-1.7
(2)12.8÷[0.5×(23.5-7.5)]
(3)1.25×7.6-0.25×7.6
(4)(8.25-3.75)÷2.5÷4. 展开
(1)4.25÷2.5×101-1.7
(2)12.8÷[0.5×(23.5-7.5)]
(3)1.25×7.6-0.25×7.6
(4)(8.25-3.75)÷2.5÷4. 展开
1个回答
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(1)4.25÷2.5×101-1.7
=1.7×101-1.7
=1.7×(101-1)
=1.7×100
=170
(2)12.8÷[0.5×(23.5-7.5)]
=12.8÷[0.5×16]
=12.8÷8
=1.6
(3)1.25×7.6-0.25×7.6
=(1.25-0.25)×7.6
=1×7.6
=7.6
(4)(8.25-3.75)÷2.5÷4
=4.5÷(2.5×4)
=4.5÷10
=0.45
=1.7×101-1.7
=1.7×(101-1)
=1.7×100
=170
(2)12.8÷[0.5×(23.5-7.5)]
=12.8÷[0.5×16]
=12.8÷8
=1.6
(3)1.25×7.6-0.25×7.6
=(1.25-0.25)×7.6
=1×7.6
=7.6
(4)(8.25-3.75)÷2.5÷4
=4.5÷(2.5×4)
=4.5÷10
=0.45
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