数学简便计算:0.25*0.64*4/0.64 9.9*8+7.7*4 9.9*22+3.3*34
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![数学简便计算:0.25*0.64*4/0.64 9.9*8+7.7*4 9.9*22+3.3*34](/uploads/image/z/182157-69-7.jpg?t=%E6%95%B0%E5%AD%A6%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%9A0.25%2A0.64%2A4%2F0.64+9.9%2A8%2B7.7%2A4+9.9%2A22%2B3.3%2A34)
数学简便计算:0.25*0.64*4/0.64 9.9*8+7.7*4 9.9*22+3.3*34
数学简便计算:0.25*0.64*4/0.64 9.9*8+7.7*4 9.9*22+3.3*34
数学简便计算:0.25*0.64*4/0.64 9.9*8+7.7*4 9.9*22+3.3*34
数学简便计算:
0.25*0.64*4/0.64
解,得:
==(0.25*4)0.64/0.64
==1
9.9*8+7.7*4
解,得:
==(10-0.1)*8+(8-0.3)*4
==80-0.8+32-1.2
==112-2
==110
9.9*22+3.3*34
解,得:
==(10-0.1)*22+(3+0.3)*34
==220-2.2+102+10.2
==322+8
==330
0.25*0.64*4/0.64
=0.25*4*0.64/0.64
=1
9.9*8+7.7*4
=(10-0.1)*8+(8-0.3)*4
=80-0.8+32-1.2
=112-2
=110
9.9*22+3.3*34
=(10-0.1)*22+(3+0.3)*34
=220-2.2+102+10.2
=322+8
=330
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