第1个回答 2022-04-13
4.6×28+0.46×720的简便计算脱式计算如下:
【方法一】
4.6×28+0.46×720
=0.46×10×28+0.46×720
=0.46×280+0.46×720
=0.46×(280+720)
=0.46×1000
=460
【方法二】
4.6×28+0.46×720
=4.6×28+0.46×10×72
=0.46×28+4.6×72
=4.6×(28+72)
=4.6×100
=460
第2个回答 2022-04-13
因为0.46×720=4.6×72,运用乘法分配律逆运算就是有4.6×(28+72)=460
第3个回答 2022-04-13
4.6×28+0.46×720
=0.46×280+0.46×720
=0.46×(280+720)
=0.46×1000
=460