Toán Lớp 5: 50.680=
123.56=
65.8=
90.608=
90.9=
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Toán Lớp 5: 50.680=
123.56=
65.8=
90.608=
90.9=
Comments ( 2 )
123.56=(100+23).56=100.56+23.56=5600+1288=5888
65.8=(60+5).8=60.8+5.8=480+40=20
90.608=90.(600+8)=90.600+90.8=54000+720=54720
90.9=(100-10).9=900-90=810