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(1)10.64加2.16除2.4加9.36,(2)1.25乘14乘0.8(3)48乘0.25(4)8.9乘10.1(5)48.6乘101减48.6(6)5.5乘0.66...
(1)10.64加2.16除2.4加9.36, (2)1.25乘14乘0.8(3)48乘0.25(4)8.9乘10.1(5)48.6乘101减48.6(6)5.5乘0.66加0.34乘5.5(7)2.5乘4.3乘4(8)8.63除1.25除0.8,帮帮忙,谢谢
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2014-04-20 · 知道合伙人教育行家
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(1)10.64加2.16除2.4加9.36,
=10.64+0.9+9.36
=(10.64+9.36)+0.9
=20+0.9
=20.9
(2)1.25乘14乘0.8
=1.25×0.8×14
=1×14
=14
(3)48乘0.25
=4×12×0.25
=4×0.25×12
=1×12
=12
(4)8.9乘10.1
=8.9×(10+0.1)
=8.9×10+8.9×0.1
=89+0.89
=89.89
(5)48.6乘101减48.6
=48.6×(101-1)
=48.6×100
=4860
(6)5.5乘0.66加0.34乘5.5
=5.5×(0.66+0.34)
=5.5×1
=5.5
(7)2.5乘4.3乘4
=2.5×4×4.3
=10×4.3
=43
(8)8.63除1.25除0.8,
=8.63÷(1.25×0.8)
=8.63÷1
=8.63
=10.64+0.9+9.36
=(10.64+9.36)+0.9
=20+0.9
=20.9
(2)1.25乘14乘0.8
=1.25×0.8×14
=1×14
=14
(3)48乘0.25
=4×12×0.25
=4×0.25×12
=1×12
=12
(4)8.9乘10.1
=8.9×(10+0.1)
=8.9×10+8.9×0.1
=89+0.89
=89.89
(5)48.6乘101减48.6
=48.6×(101-1)
=48.6×100
=4860
(6)5.5乘0.66加0.34乘5.5
=5.5×(0.66+0.34)
=5.5×1
=5.5
(7)2.5乘4.3乘4
=2.5×4×4.3
=10×4.3
=43
(8)8.63除1.25除0.8,
=8.63÷(1.25×0.8)
=8.63÷1
=8.63
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