梯等式计算2.5×102-55
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梯等式计算2.5×102-55
2.5×102-55=2.5x100+2.5x2-55=250+5-55=200
2.5×102-55
=2.5×(100+2)-55
=2.5×100+2.5×2-55
=250+5-55
=250-50
=200
梯等式计算2.5×102-55
2.5×102-55=2.5x100+2.5x2-55=250+5-55=200
2.5×102-55
=2.5×(100+2)-55
=2.5×100+2.5×2-55
=250+5-55
=250-50
=200