1樓：寒夜未至
5.62-3.4+4.38
=5.62+4.38-3.4
=10-3.4
=6.6
365+289+135
=365+135+289
=500+289
=789
56×9.9+5.6
=5.6*99+5.6
=5.6(99+1)
=5.6*100
=560
八分之七×九分之十三+九分之十三÷8
=八分之七×九分之十三+九分之十三*1/8=(13/9)(7/8+1/8)
=13/9
32×五分之一+67÷5+0.2
=32*0.2+67*0.2+0.2
=0.2(32+67+1)
=0.2*100
=20不懂可追問
滿意請採納謝謝
2樓：用智慧為你解答
5.62-3.4+4.38
=5.62+4.38-3.4
=10-3.4
=6.6
365+289+135
=365+135+289
=500+289
=789
56×9.9+5.6
=5.6x99+5.6
=5.6x（99+1）
=5.6x100
=560
祝你學習進步，有不明白的可以追問！謝謝！！
3樓：匿名使用者
5.62-3.4+4.38
=5.62+4.38-3.4
=10-3.4
=6.6
365+289+135
=365+135+289
=500+289
=789
56×9.9+5.6
=56×9.9+56×0.1
=56(9.9+0.1)
=560
4樓：穗子和子一
5.62-3.4+4.38
=5.62+4.28-3.4
=10.9-3.4
=7.5
365+289+135
=365+135+289
=500+289
=789
56×9.9+5.6
=5.6x(99+1)
=5.6x100
=560
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