42X12简便计算
42X12简便计算 -
回答:42x(10十2)
42x(10十2)
回答:42x(10十2)
42x(10十2)
42x125x8x5 =(125×8)x(42×5)1000×210 =210000
42x12十=12*(42+58)12*100 =1200
42x12+89x42-42。怎样简便计算? -
原式=42×(12+89-1)42×100 =4200
计算如下:42×12-7014)÷14 =42×12/14-7014/14 =3×12-1002/2 =36-501 =-465
42x12十58x15简便计算 -
42x12十58x15 =42x12十58x12+58x3 =(42+58)x12+174 =1200+174 =1374
42x128x8x5 =(42x5)x128x8 =210x(125+3)x8 =210x(125x8+3x8)210x(1000+24)210x1000+210x24 =210000+210x6x4 =210000+5040 =215040 谢谢,请采纳,
42X12十21x6怎幺简便计算? -
42x12十21x6 =21x2x12十21x6 =21x24十21x6 =21x(24十6)=21x30 =630
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