用乘法公式计算:(1) 2 2 535 x4-465 x4 (2) 2 2 202+202x196+98
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用乘法公式计算:(1) 2 2 535 x4-465 x4 (2) 2 2 202+202x196+98
用乘法公式计算:(1) 2 2 535 x4-465 x4 (2) 2 2 202+202x196+98
用乘法公式计算:(1) 2 2 535 x4-465 x4 (2) 2 2 202+202x196+98
(22535-465)x4=22070x4=88280
22202=202x100+2002 202x100+2002 +202x196+98
=202x[196.5+100]+2002
=202x296.5+2100=61993
(2253-465)*4
2 2 535 x4-465 x4 =(22535-465)*4
=22070*4
=88280
2 2 202+202x196+98=22202+202*98*2+98
=22202+98...
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2 2 535 x4-465 x4 =(22535-465)*4
=22070*4
=88280
2 2 202+202x196+98=22202+202*98*2+98
=22202+98*(202*2+1)
=22202+405*(100-2)
=22202+405*100-405*2
=22202+40500-810
=62702-810
=61892
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