如题所述
3.14×102
= 3.14x(100+2)
=3.14x100+3.14x2
=314+6.28
=320.28
0.125×7.41×80
= 0.125x80x7.41
=10x7.41
=74.1
(3.2+0.56)÷0.8
=3.2÷0.8+0.56÷0.8
=4+0.7
=4.7
= 3.14x(100+2)
=3.14x100+3.14x2
=314+6.28
=320.28
0.125×7.41×80
= 0.125x80x7.41
=10x7.41
=74.1
(3.2+0.56)÷0.8
=3.2÷0.8+0.56÷0.8
=4+0.7
=4.7
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